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Finding the Fourth Proportional to 287,998.60, 431,997.90 and 228,512.20

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Solution

The fourth proportional to 287,998.60, 431,997.90 and 228,512.20 is: 342,768.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,998.60 : 431,997.90 = 228,512.20 : x
  2. Step 2: Convert to fraction form
    287,998.60/431,997.90 = 228,512.20/x
  3. Step 3: Cross multiply
    287,998.60x = 431,997.90 × 228,512.20
  4. Step 4: Simplify right side
    287,998.60x = 98,716,790,524.38
  5. Step 5: Solve for x
    x = 98,716,790,524.38/287,998.60
  6. Step 6: Final answer
    x = 342,768.30

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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.