Home / 1,353.20-2,025.92-1,187.78

Finding the Fourth Proportional to 1,353.20, 2,025.92 and 1,187.78

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Solution

The fourth proportional to 1,353.20, 2,025.92 and 1,187.78 is: 1,778.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,353.20 : 2,025.92 = 1,187.78 : x
  2. Step 2: Convert to fraction form
    1,353.20/2,025.92 = 1,187.78/x
  3. Step 3: Cross multiply
    1,353.20x = 2,025.92 × 1,187.78
  4. Step 4: Simplify right side
    1,353.20x = 2,406,347.26
  5. Step 5: Solve for x
    x = 2,406,347.26/1,353.20
  6. Step 6: Final answer
    x = 1,778.26

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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.