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Finding the Fourth Proportional to 479.20, 718.20 and 458.76

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Solution

The fourth proportional to 479.20, 718.20 and 458.76 is: 687.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    479.20 : 718.20 = 458.76 : x
  2. Step 2: Convert to fraction form
    479.20/718.20 = 458.76/x
  3. Step 3: Cross multiply
    479.20x = 718.20 × 458.76
  4. Step 4: Simplify right side
    479.20x = 329,481.43
  5. Step 5: Solve for x
    x = 329,481.43/479.20
  6. Step 6: Final answer
    x = 687.57

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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.