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Finding the Fourth Proportional to 371.28, 512.64 and 343.64

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Solution

The fourth proportional to 371.28, 512.64 and 343.64 is: 474.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    371.28 : 512.64 = 343.64 : x
  2. Step 2: Convert to fraction form
    371.28/512.64 = 343.64/x
  3. Step 3: Cross multiply
    371.28x = 512.64 × 343.64
  4. Step 4: Simplify right side
    371.28x = 176,161.05
  5. Step 5: Solve for x
    x = 176,161.05/371.28
  6. Step 6: Final answer
    x = 474.47

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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.