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Finding the Fourth Proportional to 614.46, 921.69 and 354.85

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Solution

The fourth proportional to 614.46, 921.69 and 354.85 is: 532.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    614.46 : 921.69 = 354.85 : x
  2. Step 2: Convert to fraction form
    614.46/921.69 = 354.85/x
  3. Step 3: Cross multiply
    614.46x = 921.69 × 354.85
  4. Step 4: Simplify right side
    614.46x = 327,061.70
  5. Step 5: Solve for x
    x = 327,061.70/614.46
  6. Step 6: Final answer
    x = 532.28

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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.