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Finding the Fourth Proportional to 392,787.69, 588,632.43 and 212,483.91

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Solution

The fourth proportional to 392,787.69, 588,632.43 and 212,483.91 is: 318,428.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,787.69 : 588,632.43 = 212,483.91 : x
  2. Step 2: Convert to fraction form
    392,787.69/588,632.43 = 212,483.91/x
  3. Step 3: Cross multiply
    392,787.69x = 588,632.43 × 212,483.91
  4. Step 4: Simplify right side
    392,787.69x = 125,074,920,279.20
  5. Step 5: Solve for x
    x = 125,074,920,279.20/392,787.69
  6. Step 6: Final answer
    x = 318,428.82

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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.