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Finding the Fourth Proportional to 773.99, 1,068.08 and 494.13

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Solution

The fourth proportional to 773.99, 1,068.08 and 494.13 is: 681.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    773.99 : 1,068.08 = 494.13 : x
  2. Step 2: Convert to fraction form
    773.99/1,068.08 = 494.13/x
  3. Step 3: Cross multiply
    773.99x = 1,068.08 × 494.13
  4. Step 4: Simplify right side
    773.99x = 527,767.90
  5. Step 5: Solve for x
    x = 527,767.90/773.99
  6. Step 6: Final answer
    x = 681.88

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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.