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Finding the Fourth Proportional to 1,644.84, 2,269.88 and 936.65

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Solution

The fourth proportional to 1,644.84, 2,269.88 and 936.65 is: 1,292.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,644.84 : 2,269.88 = 936.65 : x
  2. Step 2: Convert to fraction form
    1,644.84/2,269.88 = 936.65/x
  3. Step 3: Cross multiply
    1,644.84x = 2,269.88 × 936.65
  4. Step 4: Simplify right side
    1,644.84x = 2,126,087.61
  5. Step 5: Solve for x
    x = 2,126,087.61/1,644.84
  6. Step 6: Final answer
    x = 1,292.58

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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.