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Finding the Fourth Proportional to 546.05, 753.15 and 386.28

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Solution

The fourth proportional to 546.05, 753.15 and 386.28 is: 532.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    546.05 : 753.15 = 386.28 : x
  2. Step 2: Convert to fraction form
    546.05/753.15 = 386.28/x
  3. Step 3: Cross multiply
    546.05x = 753.15 × 386.28
  4. Step 4: Simplify right side
    546.05x = 290,926.78
  5. Step 5: Solve for x
    x = 290,926.78/546.05
  6. Step 6: Final answer
    x = 532.79

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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.