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Finding the Fourth Proportional to 864.11, 1,295.96 and 247.70

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Solution

The fourth proportional to 864.11, 1,295.96 and 247.70 is: 371.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    864.11 : 1,295.96 = 247.70 : x
  2. Step 2: Convert to fraction form
    864.11/1,295.96 = 247.70/x
  3. Step 3: Cross multiply
    864.11x = 1,295.96 × 247.70
  4. Step 4: Simplify right side
    864.11x = 321,001.57
  5. Step 5: Solve for x
    x = 321,001.57/864.11
  6. Step 6: Final answer
    x = 371.48

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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.