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Finding the Fourth Proportional to 580.40, 871.16 and 272.46

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Solution

The fourth proportional to 580.40, 871.16 and 272.46 is: 408.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    580.40 : 871.16 = 272.46 : x
  2. Step 2: Convert to fraction form
    580.40/871.16 = 272.46/x
  3. Step 3: Cross multiply
    580.40x = 871.16 × 272.46
  4. Step 4: Simplify right side
    580.40x = 237,354.89
  5. Step 5: Solve for x
    x = 237,354.89/580.40
  6. Step 6: Final answer
    x = 408.95

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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.