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Finding the Fourth Proportional to 773.90, 1,068.12 and 494.22

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Solution

The fourth proportional to 773.90, 1,068.12 and 494.22 is: 682.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    773.90 : 1,068.12 = 494.22 : x
  2. Step 2: Convert to fraction form
    773.90/1,068.12 = 494.22/x
  3. Step 3: Cross multiply
    773.90x = 1,068.12 × 494.22
  4. Step 4: Simplify right side
    773.90x = 527,892.13
  5. Step 5: Solve for x
    x = 527,892.13/773.90
  6. Step 6: Final answer
    x = 682.12

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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.