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Finding the Fourth Proportional to 371.21, 512.24 and 205.42

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Solution

The fourth proportional to 371.21, 512.24 and 205.42 is: 283.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    371.21 : 512.24 = 205.42 : x
  2. Step 2: Convert to fraction form
    371.21/512.24 = 205.42/x
  3. Step 3: Cross multiply
    371.21x = 512.24 × 205.42
  4. Step 4: Simplify right side
    371.21x = 105,220.75
  5. Step 5: Solve for x
    x = 105,220.75/371.21
  6. Step 6: Final answer
    x = 283.45

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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.