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Finding the Fourth Proportional to 353.10, 487.14 and 213.25

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Solution

The fourth proportional to 353.10, 487.14 and 213.25 is: 294.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    353.10 : 487.14 = 213.25 : x
  2. Step 2: Convert to fraction form
    353.10/487.14 = 213.25/x
  3. Step 3: Cross multiply
    353.10x = 487.14 × 213.25
  4. Step 4: Simplify right side
    353.10x = 103,882.61
  5. Step 5: Solve for x
    x = 103,882.61/353.10
  6. Step 6: Final answer
    x = 294.20

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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.