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Finding the Fourth Proportional to 547.68, 820.60 and 385.02

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Solution

The fourth proportional to 547.68, 820.60 and 385.02 is: 576.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    547.68 : 820.60 = 385.02 : x
  2. Step 2: Convert to fraction form
    547.68/820.60 = 385.02/x
  3. Step 3: Cross multiply
    547.68x = 820.60 × 385.02
  4. Step 4: Simplify right side
    547.68x = 315,945.36
  5. Step 5: Solve for x
    x = 315,945.36/547.68
  6. Step 6: Final answer
    x = 576.88

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.