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Finding the Fourth Proportional to 680,176.92, 938,725.02 and 389,892.36

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Solution

The fourth proportional to 680,176.92, 938,725.02 and 389,892.36 is: 538,097.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,176.92 : 938,725.02 = 389,892.36 : x
  2. Step 2: Convert to fraction form
    680,176.92/938,725.02 = 389,892.36/x
  3. Step 3: Cross multiply
    680,176.92x = 938,725.02 × 389,892.36
  4. Step 4: Simplify right side
    680,176.92x = 366,001,713,438.85
  5. Step 5: Solve for x
    x = 366,001,713,438.85/680,176.92
  6. Step 6: Final answer
    x = 538,097.81

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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.