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Finding the Fourth Proportional to 778.84, 1,168.44 and 454.48

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Solution

The fourth proportional to 778.84, 1,168.44 and 454.48 is: 681.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    778.84 : 1,168.44 = 454.48 : x
  2. Step 2: Convert to fraction form
    778.84/1,168.44 = 454.48/x
  3. Step 3: Cross multiply
    778.84x = 1,168.44 × 454.48
  4. Step 4: Simplify right side
    778.84x = 531,032.61
  5. Step 5: Solve for x
    x = 531,032.61/778.84
  6. Step 6: Final answer
    x = 681.83

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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.