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Finding the Fourth Proportional to 539.66, 743.53 and 445.91

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Solution

The fourth proportional to 539.66, 743.53 and 445.91 is: 614.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    539.66 : 743.53 = 445.91 : x
  2. Step 2: Convert to fraction form
    539.66/743.53 = 445.91/x
  3. Step 3: Cross multiply
    539.66x = 743.53 × 445.91
  4. Step 4: Simplify right side
    539.66x = 331,543.47
  5. Step 5: Solve for x
    x = 331,543.47/539.66
  6. Step 6: Final answer
    x = 614.35

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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.