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Finding the Fourth Proportional to 2,909, 4,363.54 and 717.72

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Solution

The fourth proportional to 2,909, 4,363.54 and 717.72 is: 1,076.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,909 : 4,363.54 = 717.72 : x
  2. Step 2: Convert to fraction form
    2,909/4,363.54 = 717.72/x
  3. Step 3: Cross multiply
    2,909x = 4,363.54 × 717.72
  4. Step 4: Simplify right side
    2,909x = 3,131,799.93
  5. Step 5: Solve for x
    x = 3,131,799.93/2,909
  6. Step 6: Final answer
    x = 1,076.59

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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.