Home / 1,073.80-1,481.20-631.61

Finding the Fourth Proportional to 1,073.80, 1,481.20 and 631.61

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Solution

The fourth proportional to 1,073.80, 1,481.20 and 631.61 is: 871.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,073.80 : 1,481.20 = 631.61 : x
  2. Step 2: Convert to fraction form
    1,073.80/1,481.20 = 631.61/x
  3. Step 3: Cross multiply
    1,073.80x = 1,481.20 × 631.61
  4. Step 4: Simplify right side
    1,073.80x = 935,540.73
  5. Step 5: Solve for x
    x = 935,540.73/1,073.80
  6. Step 6: Final answer
    x = 871.24

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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.