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Finding the Fourth Proportional to 478.27, 717.39 and 247.08

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Solution

The fourth proportional to 478.27, 717.39 and 247.08 is: 370.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    478.27 : 717.39 = 247.08 : x
  2. Step 2: Convert to fraction form
    478.27/717.39 = 247.08/x
  3. Step 3: Cross multiply
    478.27x = 717.39 × 247.08
  4. Step 4: Simplify right side
    478.27x = 177,252.72
  5. Step 5: Solve for x
    x = 177,252.72/478.27
  6. Step 6: Final answer
    x = 370.61

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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.