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Finding the Fourth Proportional to 274.57, 378.76 and 169.57

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Solution

The fourth proportional to 274.57, 378.76 and 169.57 is: 233.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    274.57 : 378.76 = 169.57 : x
  2. Step 2: Convert to fraction form
    274.57/378.76 = 169.57/x
  3. Step 3: Cross multiply
    274.57x = 378.76 × 169.57
  4. Step 4: Simplify right side
    274.57x = 64,225.49
  5. Step 5: Solve for x
    x = 64,225.49/274.57
  6. Step 6: Final answer
    x = 233.92

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.