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Finding the Fourth Proportional to 392,121.90, 588,377.43 and 155,459.34

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Solution

The fourth proportional to 392,121.90, 588,377.43 and 155,459.34 is: 233,266.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,121.90 : 588,377.43 = 155,459.34 : x
  2. Step 2: Convert to fraction form
    392,121.90/588,377.43 = 155,459.34/x
  3. Step 3: Cross multiply
    392,121.90x = 588,377.43 × 155,459.34
  4. Step 4: Simplify right side
    392,121.90x = 91,468,766,938.70
  5. Step 5: Solve for x
    x = 91,468,766,938.70/392,121.90
  6. Step 6: Final answer
    x = 233,266.15

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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.