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Finding the Fourth Proportional to 1,272.82, 1,756.27 and 748.75

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Solution

The fourth proportional to 1,272.82, 1,756.27 and 748.75 is: 1,033.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,272.82 : 1,756.27 = 748.75 : x
  2. Step 2: Convert to fraction form
    1,272.82/1,756.27 = 748.75/x
  3. Step 3: Cross multiply
    1,272.82x = 1,756.27 × 748.75
  4. Step 4: Simplify right side
    1,272.82x = 1,315,007.16
  5. Step 5: Solve for x
    x = 1,315,007.16/1,272.82
  6. Step 6: Final answer
    x = 1,033.14

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Half scale
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Double scale
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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.