Home / 1,761.11-2,642.58-1,278.14

Finding the Fourth Proportional to 1,761.11, 2,642.58 and 1,278.14

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Solution

The fourth proportional to 1,761.11, 2,642.58 and 1,278.14 is: 1,917.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,761.11 : 2,642.58 = 1,278.14 : x
  2. Step 2: Convert to fraction form
    1,761.11/2,642.58 = 1,278.14/x
  3. Step 3: Cross multiply
    1,761.11x = 2,642.58 × 1,278.14
  4. Step 4: Simplify right side
    1,761.11x = 3,377,587.20
  5. Step 5: Solve for x
    x = 3,377,587.20/1,761.11
  6. Step 6: Final answer
    x = 1,917.87

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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.