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Finding the Fourth Proportional to 479.31, 718.88 and 247.92

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Solution

The fourth proportional to 479.31, 718.88 and 247.92 is: 371.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    479.31 : 718.88 = 247.92 : x
  2. Step 2: Convert to fraction form
    479.31/718.88 = 247.92/x
  3. Step 3: Cross multiply
    479.31x = 718.88 × 247.92
  4. Step 4: Simplify right side
    479.31x = 178,223.49
  5. Step 5: Solve for x
    x = 178,223.49/479.31
  6. Step 6: Final answer
    x = 371.83

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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.