Home / 1,236.12-1,851.32-1,126.76

Finding the Fourth Proportional to 1,236.12, 1,851.32 and 1,126.76

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Solution

The fourth proportional to 1,236.12, 1,851.32 and 1,126.76 is: 1,687.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,236.12 : 1,851.32 = 1,126.76 : x
  2. Step 2: Convert to fraction form
    1,236.12/1,851.32 = 1,126.76/x
  3. Step 3: Cross multiply
    1,236.12x = 1,851.32 × 1,126.76
  4. Step 4: Simplify right side
    1,236.12x = 2,085,993.32
  5. Step 5: Solve for x
    x = 2,085,993.32/1,236.12
  6. Step 6: Final answer
    x = 1,687.53

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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.