Home / 1,449.38-1,998.78-1,117.28

Finding the Fourth Proportional to 1,449.38, 1,998.78 and 1,117.28

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Solution

The fourth proportional to 1,449.38, 1,998.78 and 1,117.28 is: 1,540.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,449.38 : 1,998.78 = 1,117.28 : x
  2. Step 2: Convert to fraction form
    1,449.38/1,998.78 = 1,117.28/x
  3. Step 3: Cross multiply
    1,449.38x = 1,998.78 × 1,117.28
  4. Step 4: Simplify right side
    1,449.38x = 2,233,186.92
  5. Step 5: Solve for x
    x = 2,233,186.92/1,449.38
  6. Step 6: Final answer
    x = 1,540.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.