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Finding the Fourth Proportional to 188.85, 260.54 and 126.62

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Solution

The fourth proportional to 188.85, 260.54 and 126.62 is: 174.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    188.85 : 260.54 = 126.62 : x
  2. Step 2: Convert to fraction form
    188.85/260.54 = 126.62/x
  3. Step 3: Cross multiply
    188.85x = 260.54 × 126.62
  4. Step 4: Simplify right side
    188.85x = 32,989.57
  5. Step 5: Solve for x
    x = 32,989.57/188.85
  6. Step 6: Final answer
    x = 174.69

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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.