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Finding the Fourth Proportional to 371.34, 512.71 and 231.65

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Solution

The fourth proportional to 371.34, 512.71 and 231.65 is: 319.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    371.34 : 512.71 = 231.65 : x
  2. Step 2: Convert to fraction form
    371.34/512.71 = 231.65/x
  3. Step 3: Cross multiply
    371.34x = 512.71 × 231.65
  4. Step 4: Simplify right side
    371.34x = 118,769.27
  5. Step 5: Solve for x
    x = 118,769.27/371.34
  6. Step 6: Final answer
    x = 319.84

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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.