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Finding the Fourth Proportional to 2,819.76, 4,230 and 872.28

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Solution

The fourth proportional to 2,819.76, 4,230 and 872.28 is: 1,308.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,819.76 : 4,230 = 872.28 : x
  2. Step 2: Convert to fraction form
    2,819.76/4,230 = 872.28/x
  3. Step 3: Cross multiply
    2,819.76x = 4,230 × 872.28
  4. Step 4: Simplify right side
    2,819.76x = 3,689,744.40
  5. Step 5: Solve for x
    x = 3,689,744.40/2,819.76
  6. Step 6: Final answer
    x = 1,308.53

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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.