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Finding the Fourth Proportional to 391,384,906.06, 585,799,882.98 and 287,726,650.16

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Solution

The fourth proportional to 391,384,906.06, 585,799,882.98 and 287,726,650.16 is: 430,650,838.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,384,906.06 : 585,799,882.98 = 287,726,650.16 : x
  2. Step 2: Convert to fraction form
    391,384,906.06/585,799,882.98 = 287,726,650.16/x
  3. Step 3: Cross multiply
    391,384,906.06x = 585,799,882.98 × 287,726,650.16
  4. Step 4: Simplify right side
    391,384,906.06x = 168,550,237,993,955,424
  5. Step 5: Solve for x
    x = 168,550,237,993,955,424/391,384,906.06
  6. Step 6: Final answer
    x = 430,650,838.56

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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.