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Finding the Fourth Proportional to 478.46, 718.04 and 247.54

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Solution

The fourth proportional to 478.46, 718.04 and 247.54 is: 371.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    478.46 : 718.04 = 247.54 : x
  2. Step 2: Convert to fraction form
    478.46/718.04 = 247.54/x
  3. Step 3: Cross multiply
    478.46x = 718.04 × 247.54
  4. Step 4: Simplify right side
    478.46x = 177,743.62
  5. Step 5: Solve for x
    x = 177,743.62/478.46
  6. Step 6: Final answer
    x = 371.49

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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.