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Finding the Fourth Proportional to 1,255.38, 1,732.47 and 695.91

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Solution

The fourth proportional to 1,255.38, 1,732.47 and 695.91 is: 960.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,255.38 : 1,732.47 = 695.91 : x
  2. Step 2: Convert to fraction form
    1,255.38/1,732.47 = 695.91/x
  3. Step 3: Cross multiply
    1,255.38x = 1,732.47 × 695.91
  4. Step 4: Simplify right side
    1,255.38x = 1,205,643.20
  5. Step 5: Solve for x
    x = 1,205,643.20/1,255.38
  6. Step 6: Final answer
    x = 960.38

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1.5x scale

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.