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Finding the Fourth Proportional to 209.34, 289.14 and 192

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Solution

The fourth proportional to 209.34, 289.14 and 192 is: 265.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    209.34 : 289.14 = 192 : x
  2. Step 2: Convert to fraction form
    209.34/289.14 = 192/x
  3. Step 3: Cross multiply
    209.34x = 289.14 × 192
  4. Step 4: Simplify right side
    209.34x = 55,514.88
  5. Step 5: Solve for x
    x = 55,514.88/209.34
  6. Step 6: Final answer
    x = 265.19

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.