Home / 1,272.57-1,757.52-1,135.14

Finding the Fourth Proportional to 1,272.57, 1,757.52 and 1,135.14

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Solution

The fourth proportional to 1,272.57, 1,757.52 and 1,135.14 is: 1,567.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,272.57 : 1,757.52 = 1,135.14 : x
  2. Step 2: Convert to fraction form
    1,272.57/1,757.52 = 1,135.14/x
  3. Step 3: Cross multiply
    1,272.57x = 1,757.52 × 1,135.14
  4. Step 4: Simplify right side
    1,272.57x = 1,995,031.25
  5. Step 5: Solve for x
    x = 1,995,031.25/1,272.57
  6. Step 6: Final answer
    x = 1,567.72

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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.