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Finding the Fourth Proportional to 188.55, 282.78 and 147.87

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Solution

The fourth proportional to 188.55, 282.78 and 147.87 is: 221.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    188.55 : 282.78 = 147.87 : x
  2. Step 2: Convert to fraction form
    188.55/282.78 = 147.87/x
  3. Step 3: Cross multiply
    188.55x = 282.78 × 147.87
  4. Step 4: Simplify right side
    188.55x = 41,814.68
  5. Step 5: Solve for x
    x = 41,814.68/188.55
  6. Step 6: Final answer
    x = 221.77

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.