Home / 1,225.90-1,691.19-926.61

Finding the Fourth Proportional to 1,225.90, 1,691.19 and 926.61

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Solution

The fourth proportional to 1,225.90, 1,691.19 and 926.61 is: 1,278.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,225.90 : 1,691.19 = 926.61 : x
  2. Step 2: Convert to fraction form
    1,225.90/1,691.19 = 926.61/x
  3. Step 3: Cross multiply
    1,225.90x = 1,691.19 × 926.61
  4. Step 4: Simplify right side
    1,225.90x = 1,567,073.57
  5. Step 5: Solve for x
    x = 1,567,073.57/1,225.90
  6. Step 6: Final answer
    x = 1,278.30

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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.