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Finding the Fourth Proportional to 274.93, 379.43 and 156.92

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Solution

The fourth proportional to 274.93, 379.43 and 156.92 is: 216.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    274.93 : 379.43 = 156.92 : x
  2. Step 2: Convert to fraction form
    274.93/379.43 = 156.92/x
  3. Step 3: Cross multiply
    274.93x = 379.43 × 156.92
  4. Step 4: Simplify right side
    274.93x = 59,540.16
  5. Step 5: Solve for x
    x = 59,540.16/274.93
  6. Step 6: Final answer
    x = 216.56

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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.