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Finding the Fourth Proportional to 239.45, 359.42 and 161.35

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Solution

The fourth proportional to 239.45, 359.42 and 161.35 is: 242.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    239.45 : 359.42 = 161.35 : x
  2. Step 2: Convert to fraction form
    239.45/359.42 = 161.35/x
  3. Step 3: Cross multiply
    239.45x = 359.42 × 161.35
  4. Step 4: Simplify right side
    239.45x = 57,992.51
  5. Step 5: Solve for x
    x = 57,992.51/239.45
  6. Step 6: Final answer
    x = 242.19

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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.