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Finding the Fourth Proportional to 188.36, 280.56 and 178.61

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Solution

The fourth proportional to 188.36, 280.56 and 178.61 is: 266.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    188.36 : 280.56 = 178.61 : x
  2. Step 2: Convert to fraction form
    188.36/280.56 = 178.61/x
  3. Step 3: Cross multiply
    188.36x = 280.56 × 178.61
  4. Step 4: Simplify right side
    188.36x = 50,110.82
  5. Step 5: Solve for x
    x = 50,110.82/188.36
  6. Step 6: Final answer
    x = 266.04

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.