Home / 1,236.31-1,851.68-867.76

Finding the Fourth Proportional to 1,236.31, 1,851.68 and 867.76

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Solution

The fourth proportional to 1,236.31, 1,851.68 and 867.76 is: 1,299.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,236.31 : 1,851.68 = 867.76 : x
  2. Step 2: Convert to fraction form
    1,236.31/1,851.68 = 867.76/x
  3. Step 3: Cross multiply
    1,236.31x = 1,851.68 × 867.76
  4. Step 4: Simplify right side
    1,236.31x = 1,606,813.84
  5. Step 5: Solve for x
    x = 1,606,813.84/1,236.31
  6. Step 6: Final answer
    x = 1,299.69

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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.