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Finding the Fourth Proportional to 2,209.54, 3,314.61 and 748.30

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Solution

The fourth proportional to 2,209.54, 3,314.61 and 748.30 is: 1,122.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,209.54 : 3,314.61 = 748.30 : x
  2. Step 2: Convert to fraction form
    2,209.54/3,314.61 = 748.30/x
  3. Step 3: Cross multiply
    2,209.54x = 3,314.61 × 748.30
  4. Step 4: Simplify right side
    2,209.54x = 2,480,322.66
  5. Step 5: Solve for x
    x = 2,480,322.66/2,209.54
  6. Step 6: Final answer
    x = 1,122.55

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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.