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Finding the Fourth Proportional to 580.91, 871.40 and 256.28

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Solution

The fourth proportional to 580.91, 871.40 and 256.28 is: 384.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    580.91 : 871.40 = 256.28 : x
  2. Step 2: Convert to fraction form
    580.91/871.40 = 256.28/x
  3. Step 3: Cross multiply
    580.91x = 871.40 × 256.28
  4. Step 4: Simplify right side
    580.91x = 223,316.75
  5. Step 5: Solve for x
    x = 223,316.75/580.91
  6. Step 6: Final answer
    x = 384.43

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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.