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Finding the Fourth Proportional to 580.72, 800.76 and 394.24

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Solution

The fourth proportional to 580.72, 800.76 and 394.24 is: 543.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    580.72 : 800.76 = 394.24 : x
  2. Step 2: Convert to fraction form
    580.72/800.76 = 394.24/x
  3. Step 3: Cross multiply
    580.72x = 800.76 × 394.24
  4. Step 4: Simplify right side
    580.72x = 315,691.62
  5. Step 5: Solve for x
    x = 315,691.62/580.72
  6. Step 6: Final answer
    x = 543.62

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.