Home / 1,236.48-1,861.68-1,091.16

Finding the Fourth Proportional to 1,236.48, 1,861.68 and 1,091.16

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Solution

The fourth proportional to 1,236.48, 1,861.68 and 1,091.16 is: 1,642.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,236.48 : 1,861.68 = 1,091.16 : x
  2. Step 2: Convert to fraction form
    1,236.48/1,861.68 = 1,091.16/x
  3. Step 3: Cross multiply
    1,236.48x = 1,861.68 × 1,091.16
  4. Step 4: Simplify right side
    1,236.48x = 2,031,390.75
  5. Step 5: Solve for x
    x = 2,031,390.75/1,236.48
  6. Step 6: Final answer
    x = 1,642.88

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.