Home / 1,387.18-2,081.24-867.54

Finding the Fourth Proportional to 1,387.18, 2,081.24 and 867.54

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Solution

The fourth proportional to 1,387.18, 2,081.24 and 867.54 is: 1,301.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,387.18 : 2,081.24 = 867.54 : x
  2. Step 2: Convert to fraction form
    1,387.18/2,081.24 = 867.54/x
  3. Step 3: Cross multiply
    1,387.18x = 2,081.24 × 867.54
  4. Step 4: Simplify right side
    1,387.18x = 1,805,558.95
  5. Step 5: Solve for x
    x = 1,805,558.95/1,387.18
  6. Step 6: Final answer
    x = 1,301.60

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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.