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Finding the Fourth Proportional to 2,679.59, 4,019.39 and 731.79

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Solution

The fourth proportional to 2,679.59, 4,019.39 and 731.79 is: 1,097.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,679.59 : 4,019.39 = 731.79 : x
  2. Step 2: Convert to fraction form
    2,679.59/4,019.39 = 731.79/x
  3. Step 3: Cross multiply
    2,679.59x = 4,019.39 × 731.79
  4. Step 4: Simplify right side
    2,679.59x = 2,941,351.24
  5. Step 5: Solve for x
    x = 2,941,351.24/2,679.59
  6. Step 6: Final answer
    x = 1,097.69

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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.