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Finding the Fourth Proportional to 343.97, 474.56 and 274.19

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Solution

The fourth proportional to 343.97, 474.56 and 274.19 is: 378.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    343.97 : 474.56 = 274.19 : x
  2. Step 2: Convert to fraction form
    343.97/474.56 = 274.19/x
  3. Step 3: Cross multiply
    343.97x = 474.56 × 274.19
  4. Step 4: Simplify right side
    343.97x = 130,115.86
  5. Step 5: Solve for x
    x = 130,115.86/343.97
  6. Step 6: Final answer
    x = 378.28

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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.