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Finding the Fourth Proportional to 773.79, 1,160.68 and 636.42

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Solution

The fourth proportional to 773.79, 1,160.68 and 636.42 is: 954.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    773.79 : 1,160.68 = 636.42 : x
  2. Step 2: Convert to fraction form
    773.79/1,160.68 = 636.42/x
  3. Step 3: Cross multiply
    773.79x = 1,160.68 × 636.42
  4. Step 4: Simplify right side
    773.79x = 738,670.98
  5. Step 5: Solve for x
    x = 738,670.98/773.79
  6. Step 6: Final answer
    x = 954.62

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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.