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Finding the Fourth Proportional to 347.34, 520.76 and 171.56

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Solution

The fourth proportional to 347.34, 520.76 and 171.56 is: 257.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    347.34 : 520.76 = 171.56 : x
  2. Step 2: Convert to fraction form
    347.34/520.76 = 171.56/x
  3. Step 3: Cross multiply
    347.34x = 520.76 × 171.56
  4. Step 4: Simplify right side
    347.34x = 89,338.12
  5. Step 5: Solve for x
    x = 89,338.12/347.34
  6. Step 6: Final answer
    x = 257.21

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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.