Home / 287,580,995,998.40-431,371,493,997.60-120,008,720,489.60

Finding the Fourth Proportional to 287,580,995,998.40, 431,371,493,997.60 and 120,008,720,489.60

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Solution

The fourth proportional to 287,580,995,998.40, 431,371,493,997.60 and 120,008,720,489.60 is: 180,013,080,734.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,580,995,998.40 : 431,371,493,997.60 = 120,008,720,489.60 : x
  2. Step 2: Convert to fraction form
    287,580,995,998.40/431,371,493,997.60 = 120,008,720,489.60/x
  3. Step 3: Cross multiply
    287,580,995,998.40x = 431,371,493,997.60 × 120,008,720,489.60
  4. Step 4: Simplify right side
    287,580,995,998.40x = 51,768,341,050,339,142,664,192
  5. Step 5: Solve for x
    x = 51,768,341,050,339,142,664,192/287,580,995,998.40
  6. Step 6: Final answer
    x = 180,013,080,734.40

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.