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Finding the Fourth Proportional to 2,572.20, 3,850.20 and 2,491.20

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Solution

The fourth proportional to 2,572.20, 3,850.20 and 2,491.20 is: 3,728.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,572.20 : 3,850.20 = 2,491.20 : x
  2. Step 2: Convert to fraction form
    2,572.20/3,850.20 = 2,491.20/x
  3. Step 3: Cross multiply
    2,572.20x = 3,850.20 × 2,491.20
  4. Step 4: Simplify right side
    2,572.20x = 9,591,618.24
  5. Step 5: Solve for x
    x = 9,591,618.24/2,572.20
  6. Step 6: Final answer
    x = 3,728.96

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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.