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Finding the Fourth Proportional to 479.59, 718.13 and 439.49

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Solution

The fourth proportional to 479.59, 718.13 and 439.49 is: 658.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    479.59 : 718.13 = 439.49 : x
  2. Step 2: Convert to fraction form
    479.59/718.13 = 439.49/x
  3. Step 3: Cross multiply
    479.59x = 718.13 × 439.49
  4. Step 4: Simplify right side
    479.59x = 315,613.85
  5. Step 5: Solve for x
    x = 315,613.85/479.59
  6. Step 6: Final answer
    x = 658.09

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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.