Home / 2,575.28-3,861.55-1,187.90

Finding the Fourth Proportional to 2,575.28, 3,861.55 and 1,187.90

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Solution

The fourth proportional to 2,575.28, 3,861.55 and 1,187.90 is: 1,781.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,575.28 : 3,861.55 = 1,187.90 : x
  2. Step 2: Convert to fraction form
    2,575.28/3,861.55 = 1,187.90/x
  3. Step 3: Cross multiply
    2,575.28x = 3,861.55 × 1,187.90
  4. Step 4: Simplify right side
    2,575.28x = 4,587,135.25
  5. Step 5: Solve for x
    x = 4,587,135.25/2,575.28
  6. Step 6: Final answer
    x = 1,781.22

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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.