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Finding the Fourth Proportional to 347.27, 520.78 and 141.73

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Solution

The fourth proportional to 347.27, 520.78 and 141.73 is: 212.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    347.27 : 520.78 = 141.73 : x
  2. Step 2: Convert to fraction form
    347.27/520.78 = 141.73/x
  3. Step 3: Cross multiply
    347.27x = 520.78 × 141.73
  4. Step 4: Simplify right side
    347.27x = 73,808.94
  5. Step 5: Solve for x
    x = 73,808.94/347.27
  6. Step 6: Final answer
    x = 212.54

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.