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Finding the Fourth Proportional to 538.53, 740.57 and 449.97

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Solution

The fourth proportional to 538.53, 740.57 and 449.97 is: 618.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    538.53 : 740.57 = 449.97 : x
  2. Step 2: Convert to fraction form
    538.53/740.57 = 449.97/x
  3. Step 3: Cross multiply
    538.53x = 740.57 × 449.97
  4. Step 4: Simplify right side
    538.53x = 333,234.28
  5. Step 5: Solve for x
    x = 333,234.28/538.53
  6. Step 6: Final answer
    x = 618.78

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.