Home / 2,780.66-4,170.97-1,115.53

Finding the Fourth Proportional to 2,780.66, 4,170.97 and 1,115.53

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Solution

The fourth proportional to 2,780.66, 4,170.97 and 1,115.53 is: 1,673.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,780.66 : 4,170.97 = 1,115.53 : x
  2. Step 2: Convert to fraction form
    2,780.66/4,170.97 = 1,115.53/x
  3. Step 3: Cross multiply
    2,780.66x = 4,170.97 × 1,115.53
  4. Step 4: Simplify right side
    2,780.66x = 4,652,842.16
  5. Step 5: Solve for x
    x = 4,652,842.16/2,780.66
  6. Step 6: Final answer
    x = 1,673.29

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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.