Home / 2,658.62-3,987.38-1,489.80

Finding the Fourth Proportional to 2,658.62, 3,987.38 and 1,489.80

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Solution

The fourth proportional to 2,658.62, 3,987.38 and 1,489.80 is: 2,234.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,658.62 : 3,987.38 = 1,489.80 : x
  2. Step 2: Convert to fraction form
    2,658.62/3,987.38 = 1,489.80/x
  3. Step 3: Cross multiply
    2,658.62x = 3,987.38 × 1,489.80
  4. Step 4: Simplify right side
    2,658.62x = 5,940,398.72
  5. Step 5: Solve for x
    x = 5,940,398.72/2,658.62
  6. Step 6: Final answer
    x = 2,234.39

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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.