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Finding the Fourth Proportional to 2,149.75, 3,224.50 and 763.06

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Solution

The fourth proportional to 2,149.75, 3,224.50 and 763.06 is: 1,144.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,149.75 : 3,224.50 = 763.06 : x
  2. Step 2: Convert to fraction form
    2,149.75/3,224.50 = 763.06/x
  3. Step 3: Cross multiply
    2,149.75x = 3,224.50 × 763.06
  4. Step 4: Simplify right side
    2,149.75x = 2,460,486.97
  5. Step 5: Solve for x
    x = 2,460,486.97/2,149.75
  6. Step 6: Final answer
    x = 1,144.55

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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.