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Finding the Fourth Proportional to 581.52, 871.72 and 216.55

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Solution

The fourth proportional to 581.52, 871.72 and 216.55 is: 324.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    581.52 : 871.72 = 216.55 : x
  2. Step 2: Convert to fraction form
    581.52/871.72 = 216.55/x
  3. Step 3: Cross multiply
    581.52x = 871.72 × 216.55
  4. Step 4: Simplify right side
    581.52x = 188,770.97
  5. Step 5: Solve for x
    x = 188,770.97/581.52
  6. Step 6: Final answer
    x = 324.62

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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.