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Finding the Fourth Proportional to 865.28, 1,194.14 and 472.31

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Solution

The fourth proportional to 865.28, 1,194.14 and 472.31 is: 651.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    865.28 : 1,194.14 = 472.31 : x
  2. Step 2: Convert to fraction form
    865.28/1,194.14 = 472.31/x
  3. Step 3: Cross multiply
    865.28x = 1,194.14 × 472.31
  4. Step 4: Simplify right side
    865.28x = 564,001.90
  5. Step 5: Solve for x
    x = 564,001.90/865.28
  6. Step 6: Final answer
    x = 651.81

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.