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Finding the Fourth Proportional to 2,250.60, 3,375.76 and 690.60

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Solution

The fourth proportional to 2,250.60, 3,375.76 and 690.60 is: 1,035.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,250.60 : 3,375.76 = 690.60 : x
  2. Step 2: Convert to fraction form
    2,250.60/3,375.76 = 690.60/x
  3. Step 3: Cross multiply
    2,250.60x = 3,375.76 × 690.60
  4. Step 4: Simplify right side
    2,250.60x = 2,331,299.86
  5. Step 5: Solve for x
    x = 2,331,299.86/2,250.60
  6. Step 6: Final answer
    x = 1,035.86

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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.