Home / 1,143.12-1,576.08-1,081.56

Finding the Fourth Proportional to 1,143.12, 1,576.08 and 1,081.56

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Solution

The fourth proportional to 1,143.12, 1,576.08 and 1,081.56 is: 1,491.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,143.12 : 1,576.08 = 1,081.56 : x
  2. Step 2: Convert to fraction form
    1,143.12/1,576.08 = 1,081.56/x
  3. Step 3: Cross multiply
    1,143.12x = 1,576.08 × 1,081.56
  4. Step 4: Simplify right side
    1,143.12x = 1,704,625.08
  5. Step 5: Solve for x
    x = 1,704,625.08/1,143.12
  6. Step 6: Final answer
    x = 1,491.20

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.