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Finding the Fourth Proportional to 353.87, 531 and 171.30

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Solution

The fourth proportional to 353.87, 531 and 171.30 is: 257.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    353.87 : 531 = 171.30 : x
  2. Step 2: Convert to fraction form
    353.87/531 = 171.30/x
  3. Step 3: Cross multiply
    353.87x = 531 × 171.30
  4. Step 4: Simplify right side
    353.87x = 90,960.30
  5. Step 5: Solve for x
    x = 90,960.30/353.87
  6. Step 6: Final answer
    x = 257.05

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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.