Home / 1,306.32-1,957.61-939.39

Finding the Fourth Proportional to 1,306.32, 1,957.61 and 939.39

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Solution

The fourth proportional to 1,306.32, 1,957.61 and 939.39 is: 1,407.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,306.32 : 1,957.61 = 939.39 : x
  2. Step 2: Convert to fraction form
    1,306.32/1,957.61 = 939.39/x
  3. Step 3: Cross multiply
    1,306.32x = 1,957.61 × 939.39
  4. Step 4: Simplify right side
    1,306.32x = 1,838,954.56
  5. Step 5: Solve for x
    x = 1,838,954.56/1,306.32
  6. Step 6: Final answer
    x = 1,407.74

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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.