Home / 3,981.60-5,972.40-1,208.70

Finding the Fourth Proportional to 3,981.60, 5,972.40 and 1,208.70

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Solution

The fourth proportional to 3,981.60, 5,972.40 and 1,208.70 is: 1,813.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,981.60 : 5,972.40 = 1,208.70 : x
  2. Step 2: Convert to fraction form
    3,981.60/5,972.40 = 1,208.70/x
  3. Step 3: Cross multiply
    3,981.60x = 5,972.40 × 1,208.70
  4. Step 4: Simplify right side
    3,981.60x = 7,218,839.88
  5. Step 5: Solve for x
    x = 7,218,839.88/3,981.60
  6. Step 6: Final answer
    x = 1,813.05

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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.