Home / 2,154.12-2,972.82-1,222.92

Finding the Fourth Proportional to 2,154.12, 2,972.82 and 1,222.92

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Solution

The fourth proportional to 2,154.12, 2,972.82 and 1,222.92 is: 1,687.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,154.12 : 2,972.82 = 1,222.92 : x
  2. Step 2: Convert to fraction form
    2,154.12/2,972.82 = 1,222.92/x
  3. Step 3: Cross multiply
    2,154.12x = 2,972.82 × 1,222.92
  4. Step 4: Simplify right side
    2,154.12x = 3,635,521.03
  5. Step 5: Solve for x
    x = 3,635,521.03/2,154.12
  6. Step 6: Final answer
    x = 1,687.71

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.