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Finding the Fourth Proportional to 2,679.35, 4,019.05 and 731.55

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Solution

The fourth proportional to 2,679.35, 4,019.05 and 731.55 is: 1,097.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,679.35 : 4,019.05 = 731.55 : x
  2. Step 2: Convert to fraction form
    2,679.35/4,019.05 = 731.55/x
  3. Step 3: Cross multiply
    2,679.35x = 4,019.05 × 731.55
  4. Step 4: Simplify right side
    2,679.35x = 2,940,134.20
  5. Step 5: Solve for x
    x = 2,940,134.20/2,679.35
  6. Step 6: Final answer
    x = 1,097.33

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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.