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Finding the Fourth Proportional to 1,108.87, 1,663.23 and 801.28

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Solution

The fourth proportional to 1,108.87, 1,663.23 and 801.28 is: 1,201.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,108.87 : 1,663.23 = 801.28 : x
  2. Step 2: Convert to fraction form
    1,108.87/1,663.23 = 801.28/x
  3. Step 3: Cross multiply
    1,108.87x = 1,663.23 × 801.28
  4. Step 4: Simplify right side
    1,108.87x = 1,332,712.93
  5. Step 5: Solve for x
    x = 1,332,712.93/1,108.87
  6. Step 6: Final answer
    x = 1,201.87

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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.