Home / 1,761.78-2,431.26-965.15

Finding the Fourth Proportional to 1,761.78, 2,431.26 and 965.15

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Solution

The fourth proportional to 1,761.78, 2,431.26 and 965.15 is: 1,331.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,761.78 : 2,431.26 = 965.15 : x
  2. Step 2: Convert to fraction form
    1,761.78/2,431.26 = 965.15/x
  3. Step 3: Cross multiply
    1,761.78x = 2,431.26 × 965.15
  4. Step 4: Simplify right side
    1,761.78x = 2,346,535.09
  5. Step 5: Solve for x
    x = 2,346,535.09/1,761.78
  6. Step 6: Final answer
    x = 1,331.91

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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.