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Finding the Fourth Proportional to 353.34, 487.42 and 213.38

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Solution

The fourth proportional to 353.34, 487.42 and 213.38 is: 294.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    353.34 : 487.42 = 213.38 : x
  2. Step 2: Convert to fraction form
    353.34/487.42 = 213.38/x
  3. Step 3: Cross multiply
    353.34x = 487.42 × 213.38
  4. Step 4: Simplify right side
    353.34x = 104,005.68
  5. Step 5: Solve for x
    x = 104,005.68/353.34
  6. Step 6: Final answer
    x = 294.35

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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.