Home / 1,243.20-1,862.64-1,025.04

Finding the Fourth Proportional to 1,243.20, 1,862.64 and 1,025.04

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Solution

The fourth proportional to 1,243.20, 1,862.64 and 1,025.04 is: 1,535.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,243.20 : 1,862.64 = 1,025.04 : x
  2. Step 2: Convert to fraction form
    1,243.20/1,862.64 = 1,025.04/x
  3. Step 3: Cross multiply
    1,243.20x = 1,862.64 × 1,025.04
  4. Step 4: Simplify right side
    1,243.20x = 1,909,280.51
  5. Step 5: Solve for x
    x = 1,909,280.51/1,243.20
  6. Step 6: Final answer
    x = 1,535.78

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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.