Home / 1,162.18-1,601.40-1,081.90

Finding the Fourth Proportional to 1,162.18, 1,601.40 and 1,081.90

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Solution

The fourth proportional to 1,162.18, 1,601.40 and 1,081.90 is: 1,490.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,162.18 : 1,601.40 = 1,081.90 : x
  2. Step 2: Convert to fraction form
    1,162.18/1,601.40 = 1,081.90/x
  3. Step 3: Cross multiply
    1,162.18x = 1,601.40 × 1,081.90
  4. Step 4: Simplify right side
    1,162.18x = 1,732,554.66
  5. Step 5: Solve for x
    x = 1,732,554.66/1,162.18
  6. Step 6: Final answer
    x = 1,490.78

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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.