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Finding the Fourth Proportional to 2,528.38, 3,791.61 and 772.85

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Solution

The fourth proportional to 2,528.38, 3,791.61 and 772.85 is: 1,158.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,528.38 : 3,791.61 = 772.85 : x
  2. Step 2: Convert to fraction form
    2,528.38/3,791.61 = 772.85/x
  3. Step 3: Cross multiply
    2,528.38x = 3,791.61 × 772.85
  4. Step 4: Simplify right side
    2,528.38x = 2,930,344.60
  5. Step 5: Solve for x
    x = 2,930,344.60/2,528.38
  6. Step 6: Final answer
    x = 1,158.98

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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.