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Finding the Fourth Proportional to 638.88, 957.30 and 614.88

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Solution

The fourth proportional to 638.88, 957.30 and 614.88 is: 921.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    638.88 : 957.30 = 614.88 : x
  2. Step 2: Convert to fraction form
    638.88/957.30 = 614.88/x
  3. Step 3: Cross multiply
    638.88x = 957.30 × 614.88
  4. Step 4: Simplify right side
    638.88x = 588,624.62
  5. Step 5: Solve for x
    x = 588,624.62/638.88
  6. Step 6: Final answer
    x = 921.34

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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.