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Finding the Fourth Proportional to 1,836.62, 2,755.37 and 912.61

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Solution

The fourth proportional to 1,836.62, 2,755.37 and 912.61 is: 1,369.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,836.62 : 2,755.37 = 912.61 : x
  2. Step 2: Convert to fraction form
    1,836.62/2,755.37 = 912.61/x
  3. Step 3: Cross multiply
    1,836.62x = 2,755.37 × 912.61
  4. Step 4: Simplify right side
    1,836.62x = 2,514,573.61
  5. Step 5: Solve for x
    x = 2,514,573.61/1,836.62
  6. Step 6: Final answer
    x = 1,369.13

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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.