Home / 1,515.03-2,268.90-863.79

Finding the Fourth Proportional to 1,515.03, 2,268.90 and 863.79

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Solution

The fourth proportional to 1,515.03, 2,268.90 and 863.79 is: 1,293.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,515.03 : 2,268.90 = 863.79 : x
  2. Step 2: Convert to fraction form
    1,515.03/2,268.90 = 863.79/x
  3. Step 3: Cross multiply
    1,515.03x = 2,268.90 × 863.79
  4. Step 4: Simplify right side
    1,515.03x = 1,959,853.13
  5. Step 5: Solve for x
    x = 1,959,853.13/1,515.03
  6. Step 6: Final answer
    x = 1,293.61

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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.