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Finding the Fourth Proportional to 478.66, 717.54 and 247.03

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Solution

The fourth proportional to 478.66, 717.54 and 247.03 is: 370.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    478.66 : 717.54 = 247.03 : x
  2. Step 2: Convert to fraction form
    478.66/717.54 = 247.03/x
  3. Step 3: Cross multiply
    478.66x = 717.54 × 247.03
  4. Step 4: Simplify right side
    478.66x = 177,253.91
  5. Step 5: Solve for x
    x = 177,253.91/478.66
  6. Step 6: Final answer
    x = 370.31

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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.