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Finding the Fourth Proportional to 7,288.80, 10,930.80 and 2,671.20

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Solution

The fourth proportional to 7,288.80, 10,930.80 and 2,671.20 is: 4,005.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,288.80 : 10,930.80 = 2,671.20 : x
  2. Step 2: Convert to fraction form
    7,288.80/10,930.80 = 2,671.20/x
  3. Step 3: Cross multiply
    7,288.80x = 10,930.80 × 2,671.20
  4. Step 4: Simplify right side
    7,288.80x = 29,198,352.96
  5. Step 5: Solve for x
    x = 29,198,352.96/7,288.80
  6. Step 6: Final answer
    x = 4,005.92

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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.