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Finding the Fourth Proportional to 580.97, 871.55 and 215.76

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Solution

The fourth proportional to 580.97, 871.55 and 215.76 is: 323.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    580.97 : 871.55 = 215.76 : x
  2. Step 2: Convert to fraction form
    580.97/871.55 = 215.76/x
  3. Step 3: Cross multiply
    580.97x = 871.55 × 215.76
  4. Step 4: Simplify right side
    580.97x = 188,044.55
  5. Step 5: Solve for x
    x = 188,044.55/580.97
  6. Step 6: Final answer
    x = 323.68

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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.