Home / 1,382.12-2,073.18-1,138.14

Finding the Fourth Proportional to 1,382.12, 2,073.18 and 1,138.14

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Solution

The fourth proportional to 1,382.12, 2,073.18 and 1,138.14 is: 1,707.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,382.12 : 2,073.18 = 1,138.14 : x
  2. Step 2: Convert to fraction form
    1,382.12/2,073.18 = 1,138.14/x
  3. Step 3: Cross multiply
    1,382.12x = 2,073.18 × 1,138.14
  4. Step 4: Simplify right side
    1,382.12x = 2,359,565.58
  5. Step 5: Solve for x
    x = 2,359,565.58/1,382.12
  6. Step 6: Final answer
    x = 1,707.20

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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.