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Finding the Fourth Proportional to 174.79, 262.32 and 138.79

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Solution

The fourth proportional to 174.79, 262.32 and 138.79 is: 208.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    174.79 : 262.32 = 138.79 : x
  2. Step 2: Convert to fraction form
    174.79/262.32 = 138.79/x
  3. Step 3: Cross multiply
    174.79x = 262.32 × 138.79
  4. Step 4: Simplify right side
    174.79x = 36,407.39
  5. Step 5: Solve for x
    x = 36,407.39/174.79
  6. Step 6: Final answer
    x = 208.29

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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.