Home / 1,287,323,998.40-1,930,985,997.60-317,975,614.40

Finding the Fourth Proportional to 1,287,323,998.40, 1,930,985,997.60 and 317,975,614.40

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Solution

The fourth proportional to 1,287,323,998.40, 1,930,985,997.60 and 317,975,614.40 is: 476,963,421.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,287,323,998.40 : 1,930,985,997.60 = 317,975,614.40 : x
  2. Step 2: Convert to fraction form
    1,287,323,998.40/1,930,985,997.60 = 317,975,614.40/x
  3. Step 3: Cross multiply
    1,287,323,998.40x = 1,930,985,997.60 × 317,975,614.40
  4. Step 4: Simplify right side
    1,287,323,998.40x = 614,006,458,984,656,896
  5. Step 5: Solve for x
    x = 614,006,458,984,656,896/1,287,323,998.40
  6. Step 6: Final answer
    x = 476,963,421.60

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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.