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Finding the Fourth Proportional to 188.92, 260.17 and 188.31

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Solution

The fourth proportional to 188.92, 260.17 and 188.31 is: 259.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    188.92 : 260.17 = 188.31 : x
  2. Step 2: Convert to fraction form
    188.92/260.17 = 188.31/x
  3. Step 3: Cross multiply
    188.92x = 260.17 × 188.31
  4. Step 4: Simplify right side
    188.92x = 48,992.61
  5. Step 5: Solve for x
    x = 48,992.61/188.92
  6. Step 6: Final answer
    x = 259.33

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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.