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Finding the Fourth Proportional to 353.72, 530.85 and 171.22

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Solution

The fourth proportional to 353.72, 530.85 and 171.22 is: 256.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    353.72 : 530.85 = 171.22 : x
  2. Step 2: Convert to fraction form
    353.72/530.85 = 171.22/x
  3. Step 3: Cross multiply
    353.72x = 530.85 × 171.22
  4. Step 4: Simplify right side
    353.72x = 90,892.14
  5. Step 5: Solve for x
    x = 90,892.14/353.72
  6. Step 6: Final answer
    x = 256.96

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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.