Home / 3,981.92-5,972.88-1,385.04

Finding the Fourth Proportional to 3,981.92, 5,972.88 and 1,385.04

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Solution

The fourth proportional to 3,981.92, 5,972.88 and 1,385.04 is: 2,077.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,981.92 : 5,972.88 = 1,385.04 : x
  2. Step 2: Convert to fraction form
    3,981.92/5,972.88 = 1,385.04/x
  3. Step 3: Cross multiply
    3,981.92x = 5,972.88 × 1,385.04
  4. Step 4: Simplify right side
    3,981.92x = 8,272,677.72
  5. Step 5: Solve for x
    x = 8,272,677.72/3,981.92
  6. Step 6: Final answer
    x = 2,077.56

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Similar ratio
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1.5x scale

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.