Home / 1,781.28-2,673.88-742.02

Finding the Fourth Proportional to 1,781.28, 2,673.88 and 742.02

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Solution

The fourth proportional to 1,781.28, 2,673.88 and 742.02 is: 1,113.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,781.28 : 2,673.88 = 742.02 : x
  2. Step 2: Convert to fraction form
    1,781.28/2,673.88 = 742.02/x
  3. Step 3: Cross multiply
    1,781.28x = 2,673.88 × 742.02
  4. Step 4: Simplify right side
    1,781.28x = 1,984,072.44
  5. Step 5: Solve for x
    x = 1,984,072.44/1,781.28
  6. Step 6: Final answer
    x = 1,113.85

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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.