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Finding the Fourth Proportional to 371.72, 513.42 and 352.22

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Solution

The fourth proportional to 371.72, 513.42 and 352.22 is: 486.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    371.72 : 513.42 = 352.22 : x
  2. Step 2: Convert to fraction form
    371.72/513.42 = 352.22/x
  3. Step 3: Cross multiply
    371.72x = 513.42 × 352.22
  4. Step 4: Simplify right side
    371.72x = 180,836.79
  5. Step 5: Solve for x
    x = 180,836.79/371.72
  6. Step 6: Final answer
    x = 486.49

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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.