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Finding the Fourth Proportional to 2,101.91, 3,153.33 and 641.18

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Solution

The fourth proportional to 2,101.91, 3,153.33 and 641.18 is: 961.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,101.91 : 3,153.33 = 641.18 : x
  2. Step 2: Convert to fraction form
    2,101.91/3,153.33 = 641.18/x
  3. Step 3: Cross multiply
    2,101.91x = 3,153.33 × 641.18
  4. Step 4: Simplify right side
    2,101.91x = 2,021,833.16
  5. Step 5: Solve for x
    x = 2,021,833.16/2,101.91
  6. Step 6: Final answer
    x = 961.90

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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.