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Finding the Fourth Proportional to 778.76, 1,168.14 and 534.55

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Solution

The fourth proportional to 778.76, 1,168.14 and 534.55 is: 801.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    778.76 : 1,168.14 = 534.55 : x
  2. Step 2: Convert to fraction form
    778.76/1,168.14 = 534.55/x
  3. Step 3: Cross multiply
    778.76x = 1,168.14 × 534.55
  4. Step 4: Simplify right side
    778.76x = 624,423.40
  5. Step 5: Solve for x
    x = 624,423.40/778.76
  6. Step 6: Final answer
    x = 801.82

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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.