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Finding the Fourth Proportional to 720.97, 994.92 and 406.26

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Solution

The fourth proportional to 720.97, 994.92 and 406.26 is: 560.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    720.97 : 994.92 = 406.26 : x
  2. Step 2: Convert to fraction form
    720.97/994.92 = 406.26/x
  3. Step 3: Cross multiply
    720.97x = 994.92 × 406.26
  4. Step 4: Simplify right side
    720.97x = 404,193.59
  5. Step 5: Solve for x
    x = 404,193.59/720.97
  6. Step 6: Final answer
    x = 560.63

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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.