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Finding the Fourth Proportional to 539.65, 742.93 and 408.43

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Solution

The fourth proportional to 539.65, 742.93 and 408.43 is: 562.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    539.65 : 742.93 = 408.43 : x
  2. Step 2: Convert to fraction form
    539.65/742.93 = 408.43/x
  3. Step 3: Cross multiply
    539.65x = 742.93 × 408.43
  4. Step 4: Simplify right side
    539.65x = 303,434.90
  5. Step 5: Solve for x
    x = 303,434.90/539.65
  6. Step 6: Final answer
    x = 562.28

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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.