Home / 2,167.78-3,257.02-1,388.12

Finding the Fourth Proportional to 2,167.78, 3,257.02 and 1,388.12

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Solution

The fourth proportional to 2,167.78, 3,257.02 and 1,388.12 is: 2,085.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,167.78 : 3,257.02 = 1,388.12 : x
  2. Step 2: Convert to fraction form
    2,167.78/3,257.02 = 1,388.12/x
  3. Step 3: Cross multiply
    2,167.78x = 3,257.02 × 1,388.12
  4. Step 4: Simplify right side
    2,167.78x = 4,521,134.60
  5. Step 5: Solve for x
    x = 4,521,134.60/2,167.78
  6. Step 6: Final answer
    x = 2,085.61

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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.