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Finding the Fourth Proportional to 188.57, 260.37 and 126.45

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Solution

The fourth proportional to 188.57, 260.37 and 126.45 is: 174.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    188.57 : 260.37 = 126.45 : x
  2. Step 2: Convert to fraction form
    188.57/260.37 = 126.45/x
  3. Step 3: Cross multiply
    188.57x = 260.37 × 126.45
  4. Step 4: Simplify right side
    188.57x = 32,924.14
  5. Step 5: Solve for x
    x = 32,924.14/188.57
  6. Step 6: Final answer
    x = 174.60

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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.