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Finding the Fourth Proportional to 680,726,471.54, 939,377,729.61 and 379,296,208.73

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Solution

The fourth proportional to 680,726,471.54, 939,377,729.61 and 379,296,208.73 is: 523,414,949.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,726,471.54 : 939,377,729.61 = 379,296,208.73 : x
  2. Step 2: Convert to fraction form
    680,726,471.54/939,377,729.61 = 379,296,208.73/x
  3. Step 3: Cross multiply
    680,726,471.54x = 939,377,729.61 × 379,296,208.73
  4. Step 4: Simplify right side
    680,726,471.54x = 356,302,411,409,042,432
  5. Step 5: Solve for x
    x = 356,302,411,409,042,432/680,726,471.54
  6. Step 6: Final answer
    x = 523,414,949.04

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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.