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Finding the Fourth Proportional to 1,272.76, 1,756.02 and 748.96

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Solution

The fourth proportional to 1,272.76, 1,756.02 and 748.96 is: 1,033.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,272.76 : 1,756.02 = 748.96 : x
  2. Step 2: Convert to fraction form
    1,272.76/1,756.02 = 748.96/x
  3. Step 3: Cross multiply
    1,272.76x = 1,756.02 × 748.96
  4. Step 4: Simplify right side
    1,272.76x = 1,315,188.74
  5. Step 5: Solve for x
    x = 1,315,188.74/1,272.76
  6. Step 6: Final answer
    x = 1,033.34

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Find fourth proportional to 636.38, 878.01 and 374.48
Half scale
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Double scale
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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.