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Finding the Fourth Proportional to 967.85, 1,451.78 and 274.55

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Solution

The fourth proportional to 967.85, 1,451.78 and 274.55 is: 411.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    967.85 : 1,451.78 = 274.55 : x
  2. Step 2: Convert to fraction form
    967.85/1,451.78 = 274.55/x
  3. Step 3: Cross multiply
    967.85x = 1,451.78 × 274.55
  4. Step 4: Simplify right side
    967.85x = 398,577.57
  5. Step 5: Solve for x
    x = 398,577.57/967.85
  6. Step 6: Final answer
    x = 411.82

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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.