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Finding the Fourth Proportional to 721,797,116.01, 996,053,348.03 and 391,765,169.13

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Solution

The fourth proportional to 721,797,116.01, 996,053,348.03 and 391,765,169.13 is: 540,621,456.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,797,116.01 : 996,053,348.03 = 391,765,169.13 : x
  2. Step 2: Convert to fraction form
    721,797,116.01/996,053,348.03 = 391,765,169.13/x
  3. Step 3: Cross multiply
    721,797,116.01x = 996,053,348.03 × 391,765,169.13
  4. Step 4: Simplify right side
    721,797,116.01x = 390,219,008,351,516,864
  5. Step 5: Solve for x
    x = 390,219,008,351,516,864/721,797,116.01
  6. Step 6: Final answer
    x = 540,621,456.77

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.