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Finding the Fourth Proportional to 543.39, 750.47 and 439.61

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Solution

The fourth proportional to 543.39, 750.47 and 439.61 is: 607.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    543.39 : 750.47 = 439.61 : x
  2. Step 2: Convert to fraction form
    543.39/750.47 = 439.61/x
  3. Step 3: Cross multiply
    543.39x = 750.47 × 439.61
  4. Step 4: Simplify right side
    543.39x = 329,908.17
  5. Step 5: Solve for x
    x = 329,908.17/543.39
  6. Step 6: Final answer
    x = 607.13

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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.