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Finding the Fourth Proportional to 439.83, 658.94 and 317.79

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Solution

The fourth proportional to 439.83, 658.94 and 317.79 is: 476.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    439.83 : 658.94 = 317.79 : x
  2. Step 2: Convert to fraction form
    439.83/658.94 = 317.79/x
  3. Step 3: Cross multiply
    439.83x = 658.94 × 317.79
  4. Step 4: Simplify right side
    439.83x = 209,402.95
  5. Step 5: Solve for x
    x = 209,402.95/439.83
  6. Step 6: Final answer
    x = 476.10

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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.