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Finding the Fourth Proportional to 665,939,127.80, 998,908,691.70 and 654,460,002.20

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Solution

The fourth proportional to 665,939,127.80, 998,908,691.70 and 654,460,002.20 is: 981,690,003.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,939,127.80 : 998,908,691.70 = 654,460,002.20 : x
  2. Step 2: Convert to fraction form
    665,939,127.80/998,908,691.70 = 654,460,002.20/x
  3. Step 3: Cross multiply
    665,939,127.80x = 998,908,691.70 × 654,460,002.20
  4. Step 4: Simplify right side
    665,939,127.80x = 653,745,784,567,581,184
  5. Step 5: Solve for x
    x = 653,745,784,567,581,184/665,939,127.80
  6. Step 6: Final answer
    x = 981,690,003.30

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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.