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Finding the Fourth Proportional to 543.36, 748.80 and 387.84

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Solution

The fourth proportional to 543.36, 748.80 and 387.84 is: 534.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    543.36 : 748.80 = 387.84 : x
  2. Step 2: Convert to fraction form
    543.36/748.80 = 387.84/x
  3. Step 3: Cross multiply
    543.36x = 748.80 × 387.84
  4. Step 4: Simplify right side
    543.36x = 290,414.59
  5. Step 5: Solve for x
    x = 290,414.59/543.36
  6. Step 6: Final answer
    x = 534.48

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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.