Home / 1,331.12-1,997.36-746.78

Finding the Fourth Proportional to 1,331.12, 1,997.36 and 746.78

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Solution

The fourth proportional to 1,331.12, 1,997.36 and 746.78 is: 1,120.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,331.12 : 1,997.36 = 746.78 : x
  2. Step 2: Convert to fraction form
    1,331.12/1,997.36 = 746.78/x
  3. Step 3: Cross multiply
    1,331.12x = 1,997.36 × 746.78
  4. Step 4: Simplify right side
    1,331.12x = 1,491,574.78
  5. Step 5: Solve for x
    x = 1,491,574.78/1,331.12
  6. Step 6: Final answer
    x = 1,120.55

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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.