Home / 1,306.81-1,961.12-1,191.97

Finding the Fourth Proportional to 1,306.81, 1,961.12 and 1,191.97

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Solution

The fourth proportional to 1,306.81, 1,961.12 and 1,191.97 is: 1,788.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,306.81 : 1,961.12 = 1,191.97 : x
  2. Step 2: Convert to fraction form
    1,306.81/1,961.12 = 1,191.97/x
  3. Step 3: Cross multiply
    1,306.81x = 1,961.12 × 1,191.97
  4. Step 4: Simplify right side
    1,306.81x = 2,337,596.21
  5. Step 5: Solve for x
    x = 2,337,596.21/1,306.81
  6. Step 6: Final answer
    x = 1,788.78

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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.