Home / 1,781.12-2,672.40-959.36

Finding the Fourth Proportional to 1,781.12, 2,672.40 and 959.36

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Solution

The fourth proportional to 1,781.12, 2,672.40 and 959.36 is: 1,439.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,781.12 : 2,672.40 = 959.36 : x
  2. Step 2: Convert to fraction form
    1,781.12/2,672.40 = 959.36/x
  3. Step 3: Cross multiply
    1,781.12x = 2,672.40 × 959.36
  4. Step 4: Simplify right side
    1,781.12x = 2,563,793.66
  5. Step 5: Solve for x
    x = 2,563,793.66/1,781.12
  6. Step 6: Final answer
    x = 1,439.43

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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.