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Finding the Fourth Proportional to 580.80, 871.18 and 272.54

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Solution

The fourth proportional to 580.80, 871.18 and 272.54 is: 408.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    580.80 : 871.18 = 272.54 : x
  2. Step 2: Convert to fraction form
    580.80/871.18 = 272.54/x
  3. Step 3: Cross multiply
    580.80x = 871.18 × 272.54
  4. Step 4: Simplify right side
    580.80x = 237,431.40
  5. Step 5: Solve for x
    x = 237,431.40/580.80
  6. Step 6: Final answer
    x = 408.80

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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.