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Finding the Fourth Proportional to 1,722.75, 2,584.12 and 748.32

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Solution

The fourth proportional to 1,722.75, 2,584.12 and 748.32 is: 1,122.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,722.75 : 2,584.12 = 748.32 : x
  2. Step 2: Convert to fraction form
    1,722.75/2,584.12 = 748.32/x
  3. Step 3: Cross multiply
    1,722.75x = 2,584.12 × 748.32
  4. Step 4: Simplify right side
    1,722.75x = 1,933,748.68
  5. Step 5: Solve for x
    x = 1,933,748.68/1,722.75
  6. Step 6: Final answer
    x = 1,122.48

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.