Home / 2,081.20-2,872.12-1,197.18

Finding the Fourth Proportional to 2,081.20, 2,872.12 and 1,197.18

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Solution

The fourth proportional to 2,081.20, 2,872.12 and 1,197.18 is: 1,652.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,081.20 : 2,872.12 = 1,197.18 : x
  2. Step 2: Convert to fraction form
    2,081.20/2,872.12 = 1,197.18/x
  3. Step 3: Cross multiply
    2,081.20x = 2,872.12 × 1,197.18
  4. Step 4: Simplify right side
    2,081.20x = 3,438,444.62
  5. Step 5: Solve for x
    x = 3,438,444.62/2,081.20
  6. Step 6: Final answer
    x = 1,652.15

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Double scale
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1.5x scale

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.