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Finding the Fourth Proportional to 778.73, 1,168.14 and 316.73

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Solution

The fourth proportional to 778.73, 1,168.14 and 316.73 is: 475.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    778.73 : 1,168.14 = 316.73 : x
  2. Step 2: Convert to fraction form
    778.73/1,168.14 = 316.73/x
  3. Step 3: Cross multiply
    778.73x = 1,168.14 × 316.73
  4. Step 4: Simplify right side
    778.73x = 369,979.14
  5. Step 5: Solve for x
    x = 369,979.14/778.73
  6. Step 6: Final answer
    x = 475.11

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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.