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Finding the Fourth Proportional to 2,821.60, 4,227.78 and 2,713.60

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Solution

The fourth proportional to 2,821.60, 4,227.78 and 2,713.60 is: 4,065.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,821.60 : 4,227.78 = 2,713.60 : x
  2. Step 2: Convert to fraction form
    2,821.60/4,227.78 = 2,713.60/x
  3. Step 3: Cross multiply
    2,821.60x = 4,227.78 × 2,713.60
  4. Step 4: Simplify right side
    2,821.60x = 11,472,503.81
  5. Step 5: Solve for x
    x = 11,472,503.81/2,821.60
  6. Step 6: Final answer
    x = 4,065.96

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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.