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Finding the Fourth Proportional to 5,490.80, 8,230.80 and 2,717.90

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Solution

The fourth proportional to 5,490.80, 8,230.80 and 2,717.90 is: 4,074.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,490.80 : 8,230.80 = 2,717.90 : x
  2. Step 2: Convert to fraction form
    5,490.80/8,230.80 = 2,717.90/x
  3. Step 3: Cross multiply
    5,490.80x = 8,230.80 × 2,717.90
  4. Step 4: Simplify right side
    5,490.80x = 22,370,491.32
  5. Step 5: Solve for x
    x = 22,370,491.32/5,490.80
  6. Step 6: Final answer
    x = 4,074.18

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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.