Home / 2,489.28-3,729.72-1,187.88

Finding the Fourth Proportional to 2,489.28, 3,729.72 and 1,187.88

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Solution

The fourth proportional to 2,489.28, 3,729.72 and 1,187.88 is: 1,779.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,489.28 : 3,729.72 = 1,187.88 : x
  2. Step 2: Convert to fraction form
    2,489.28/3,729.72 = 1,187.88/x
  3. Step 3: Cross multiply
    2,489.28x = 3,729.72 × 1,187.88
  4. Step 4: Simplify right side
    2,489.28x = 4,430,459.79
  5. Step 5: Solve for x
    x = 4,430,459.79/2,489.28
  6. Step 6: Final answer
    x = 1,779.82

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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.