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Finding the Fourth Proportional to 357.31, 535.36 and 161.99

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Solution

The fourth proportional to 357.31, 535.36 and 161.99 is: 242.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    357.31 : 535.36 = 161.99 : x
  2. Step 2: Convert to fraction form
    357.31/535.36 = 161.99/x
  3. Step 3: Cross multiply
    357.31x = 535.36 × 161.99
  4. Step 4: Simplify right side
    357.31x = 86,722.97
  5. Step 5: Solve for x
    x = 86,722.97/357.31
  6. Step 6: Final answer
    x = 242.71

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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.