Home / 1,261.46-1,748.19-1,243.85

Finding the Fourth Proportional to 1,261.46, 1,748.19 and 1,243.85

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Solution

The fourth proportional to 1,261.46, 1,748.19 and 1,243.85 is: 1,723.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,261.46 : 1,748.19 = 1,243.85 : x
  2. Step 2: Convert to fraction form
    1,261.46/1,748.19 = 1,243.85/x
  3. Step 3: Cross multiply
    1,261.46x = 1,748.19 × 1,243.85
  4. Step 4: Simplify right side
    1,261.46x = 2,174,482.05
  5. Step 5: Solve for x
    x = 2,174,482.05/1,261.46
  6. Step 6: Final answer
    x = 1,723.78

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.