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Finding the Fourth Proportional to 778.50, 1,168.38 and 454.10

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Solution

The fourth proportional to 778.50, 1,168.38 and 454.10 is: 681.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    778.50 : 1,168.38 = 454.10 : x
  2. Step 2: Convert to fraction form
    778.50/1,168.38 = 454.10/x
  3. Step 3: Cross multiply
    778.50x = 1,168.38 × 454.10
  4. Step 4: Simplify right side
    778.50x = 530,555.52
  5. Step 5: Solve for x
    x = 530,555.52/778.50
  6. Step 6: Final answer
    x = 681.51

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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.