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Finding the Fourth Proportional to 773.97, 1,068.30 and 522.20

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Solution

The fourth proportional to 773.97, 1,068.30 and 522.20 is: 720.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    773.97 : 1,068.30 = 522.20 : x
  2. Step 2: Convert to fraction form
    773.97/1,068.30 = 522.20/x
  3. Step 3: Cross multiply
    773.97x = 1,068.30 × 522.20
  4. Step 4: Simplify right side
    773.97x = 557,860.92
  5. Step 5: Solve for x
    x = 557,860.92/773.97
  6. Step 6: Final answer
    x = 720.78

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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.