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Finding the Fourth Proportional to 371.48, 513.05 and 247.66

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Solution

The fourth proportional to 371.48, 513.05 and 247.66 is: 342.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    371.48 : 513.05 = 247.66 : x
  2. Step 2: Convert to fraction form
    371.48/513.05 = 247.66/x
  3. Step 3: Cross multiply
    371.48x = 513.05 × 247.66
  4. Step 4: Simplify right side
    371.48x = 127,061.96
  5. Step 5: Solve for x
    x = 127,061.96/371.48
  6. Step 6: Final answer
    x = 342.04

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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.