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Finding the Fourth Proportional to 1,003.38, 1,505.58 and 614.20

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Solution

The fourth proportional to 1,003.38, 1,505.58 and 614.20 is: 921.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,003.38 : 1,505.58 = 614.20 : x
  2. Step 2: Convert to fraction form
    1,003.38/1,505.58 = 614.20/x
  3. Step 3: Cross multiply
    1,003.38x = 1,505.58 × 614.20
  4. Step 4: Simplify right side
    1,003.38x = 924,727.24
  5. Step 5: Solve for x
    x = 924,727.24/1,003.38
  6. Step 6: Final answer
    x = 921.61

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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.