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Finding the Fourth Proportional to 371.29, 512.56 and 231.45

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Solution

The fourth proportional to 371.29, 512.56 and 231.45 is: 319.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    371.29 : 512.56 = 231.45 : x
  2. Step 2: Convert to fraction form
    371.29/512.56 = 231.45/x
  3. Step 3: Cross multiply
    371.29x = 512.56 × 231.45
  4. Step 4: Simplify right side
    371.29x = 118,632.01
  5. Step 5: Solve for x
    x = 118,632.01/371.29
  6. Step 6: Final answer
    x = 319.51

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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.