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Finding the Fourth Proportional to 724.14, 1,082.70 and 622.62

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Solution

The fourth proportional to 724.14, 1,082.70 and 622.62 is: 930.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    724.14 : 1,082.70 = 622.62 : x
  2. Step 2: Convert to fraction form
    724.14/1,082.70 = 622.62/x
  3. Step 3: Cross multiply
    724.14x = 1,082.70 × 622.62
  4. Step 4: Simplify right side
    724.14x = 674,110.67
  5. Step 5: Solve for x
    x = 674,110.67/724.14
  6. Step 6: Final answer
    x = 930.91

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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.