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Finding the Fourth Proportional to 439.24, 658.62 and 317.80

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Solution

The fourth proportional to 439.24, 658.62 and 317.80 is: 476.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    439.24 : 658.62 = 317.80 : x
  2. Step 2: Convert to fraction form
    439.24/658.62 = 317.80/x
  3. Step 3: Cross multiply
    439.24x = 658.62 × 317.80
  4. Step 4: Simplify right side
    439.24x = 209,309.44
  5. Step 5: Solve for x
    x = 209,309.44/439.24
  6. Step 6: Final answer
    x = 476.53

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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.