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Finding the Fourth Proportional to 543.15, 748.45 and 375.15

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Solution

The fourth proportional to 543.15, 748.45 and 375.15 is: 516.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    543.15 : 748.45 = 375.15 : x
  2. Step 2: Convert to fraction form
    543.15/748.45 = 375.15/x
  3. Step 3: Cross multiply
    543.15x = 748.45 × 375.15
  4. Step 4: Simplify right side
    543.15x = 280,781.02
  5. Step 5: Solve for x
    x = 280,781.02/543.15
  6. Step 6: Final answer
    x = 516.95

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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.