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Finding the Fourth Proportional to 371.29, 512.28 and 253.05

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Solution

The fourth proportional to 371.29, 512.28 and 253.05 is: 349.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    371.29 : 512.28 = 253.05 : x
  2. Step 2: Convert to fraction form
    371.29/512.28 = 253.05/x
  3. Step 3: Cross multiply
    371.29x = 512.28 × 253.05
  4. Step 4: Simplify right side
    371.29x = 129,632.45
  5. Step 5: Solve for x
    x = 129,632.45/371.29
  6. Step 6: Final answer
    x = 349.14

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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.