Home / 644,436,010.60-966,654,015.90-399,547,997.80

Finding the Fourth Proportional to 644,436,010.60, 966,654,015.90 and 399,547,997.80

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Solution

The fourth proportional to 644,436,010.60, 966,654,015.90 and 399,547,997.80 is: 599,321,996.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,436,010.60 : 966,654,015.90 = 399,547,997.80 : x
  2. Step 2: Convert to fraction form
    644,436,010.60/966,654,015.90 = 399,547,997.80/x
  3. Step 3: Cross multiply
    644,436,010.60x = 966,654,015.90 × 399,547,997.80
  4. Step 4: Simplify right side
    644,436,010.60x = 386,224,676,618,174,336
  5. Step 5: Solve for x
    x = 386,224,676,618,174,336/644,436,010.60
  6. Step 6: Final answer
    x = 599,321,996.70

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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.