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Finding the Fourth Proportional to 547.05, 754.53 and 387.28

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Solution

The fourth proportional to 547.05, 754.53 and 387.28 is: 534.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    547.05 : 754.53 = 387.28 : x
  2. Step 2: Convert to fraction form
    547.05/754.53 = 387.28/x
  3. Step 3: Cross multiply
    547.05x = 754.53 × 387.28
  4. Step 4: Simplify right side
    547.05x = 292,214.38
  5. Step 5: Solve for x
    x = 292,214.38/547.05
  6. Step 6: Final answer
    x = 534.16

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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.