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Finding the Fourth Proportional to 3,542.80, 5,315.80 and 1,693.20

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Solution

The fourth proportional to 3,542.80, 5,315.80 and 1,693.20 is: 2,540.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,542.80 : 5,315.80 = 1,693.20 : x
  2. Step 2: Convert to fraction form
    3,542.80/5,315.80 = 1,693.20/x
  3. Step 3: Cross multiply
    3,542.80x = 5,315.80 × 1,693.20
  4. Step 4: Simplify right side
    3,542.80x = 9,000,712.56
  5. Step 5: Solve for x
    x = 9,000,712.56/3,542.80
  6. Step 6: Final answer
    x = 2,540.56

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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.