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Finding the Fourth Proportional to 727.89, 1,092.78 and 453.12

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Solution

The fourth proportional to 727.89, 1,092.78 and 453.12 is: 680.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    727.89 : 1,092.78 = 453.12 : x
  2. Step 2: Convert to fraction form
    727.89/1,092.78 = 453.12/x
  3. Step 3: Cross multiply
    727.89x = 1,092.78 × 453.12
  4. Step 4: Simplify right side
    727.89x = 495,160.47
  5. Step 5: Solve for x
    x = 495,160.47/727.89
  6. Step 6: Final answer
    x = 680.27

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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.