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Finding the Fourth Proportional to 660,727,456.00, 990,879,020.70 and 217,970,618.20

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Solution

The fourth proportional to 660,727,456.00, 990,879,020.70 and 217,970,618.20 is: 326,885,935.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,727,456.00 : 990,879,020.70 = 217,970,618.20 : x
  2. Step 2: Convert to fraction form
    660,727,456.00/990,879,020.70 = 217,970,618.20/x
  3. Step 3: Cross multiply
    660,727,456.00x = 990,879,020.70 × 217,970,618.20
  4. Step 4: Simplify right side
    660,727,456.00x = 215,982,512,700,094,976
  5. Step 5: Solve for x
    x = 215,982,512,700,094,976/660,727,456.00
  6. Step 6: Final answer
    x = 326,885,935.71

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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.