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Finding the Fourth Proportional to 371.74, 512.99 and 224.30

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Solution

The fourth proportional to 371.74, 512.99 and 224.30 is: 309.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    371.74 : 512.99 = 224.30 : x
  2. Step 2: Convert to fraction form
    371.74/512.99 = 224.30/x
  3. Step 3: Cross multiply
    371.74x = 512.99 × 224.30
  4. Step 4: Simplify right side
    371.74x = 115,063.66
  5. Step 5: Solve for x
    x = 115,063.66/371.74
  6. Step 6: Final answer
    x = 309.53

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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.