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Finding the Fourth Proportional to 371.18, 511.95 and 253.25

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Solution

The fourth proportional to 371.18, 511.95 and 253.25 is: 349.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    371.18 : 511.95 = 253.25 : x
  2. Step 2: Convert to fraction form
    371.18/511.95 = 253.25/x
  3. Step 3: Cross multiply
    371.18x = 511.95 × 253.25
  4. Step 4: Simplify right side
    371.18x = 129,648.78
  5. Step 5: Solve for x
    x = 129,648.78/371.18
  6. Step 6: Final answer
    x = 349.29

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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.