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Finding the Fourth Proportional to 843.92, 1,265.90 and 454.25

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Solution

The fourth proportional to 843.92, 1,265.90 and 454.25 is: 681.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    843.92 : 1,265.90 = 454.25 : x
  2. Step 2: Convert to fraction form
    843.92/1,265.90 = 454.25/x
  3. Step 3: Cross multiply
    843.92x = 1,265.90 × 454.25
  4. Step 4: Simplify right side
    843.92x = 575,029.03
  5. Step 5: Solve for x
    x = 575,029.03/843.92
  6. Step 6: Final answer
    x = 681.38

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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.