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Finding the Fourth Proportional to 2,209.60, 3,314.76 and 748.88

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Solution

The fourth proportional to 2,209.60, 3,314.76 and 748.88 is: 1,123.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,209.60 : 3,314.76 = 748.88 : x
  2. Step 2: Convert to fraction form
    2,209.60/3,314.76 = 748.88/x
  3. Step 3: Cross multiply
    2,209.60x = 3,314.76 × 748.88
  4. Step 4: Simplify right side
    2,209.60x = 2,482,357.47
  5. Step 5: Solve for x
    x = 2,482,357.47/2,209.60
  6. Step 6: Final answer
    x = 1,123.44

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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.