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Finding the Fourth Proportional to 2,640.84, 3,644.60 and 1,521.82

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Solution

The fourth proportional to 2,640.84, 3,644.60 and 1,521.82 is: 2,100.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,640.84 : 3,644.60 = 1,521.82 : x
  2. Step 2: Convert to fraction form
    2,640.84/3,644.60 = 1,521.82/x
  3. Step 3: Cross multiply
    2,640.84x = 3,644.60 × 1,521.82
  4. Step 4: Simplify right side
    2,640.84x = 5,546,422.12
  5. Step 5: Solve for x
    x = 5,546,422.12/2,640.84
  6. Step 6: Final answer
    x = 2,100.25

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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.