Home / 1,781.28-2,667.13-1,163.45

Finding the Fourth Proportional to 1,781.28, 2,667.13 and 1,163.45

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Solution

The fourth proportional to 1,781.28, 2,667.13 and 1,163.45 is: 1,742.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,781.28 : 2,667.13 = 1,163.45 : x
  2. Step 2: Convert to fraction form
    1,781.28/2,667.13 = 1,163.45/x
  3. Step 3: Cross multiply
    1,781.28x = 2,667.13 × 1,163.45
  4. Step 4: Simplify right side
    1,781.28x = 3,103,076.16
  5. Step 5: Solve for x
    x = 3,103,076.16/1,781.28
  6. Step 6: Final answer
    x = 1,742.05

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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.