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Finding the Fourth Proportional to 188.60, 282.74 and 147.89

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Solution

The fourth proportional to 188.60, 282.74 and 147.89 is: 221.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    188.60 : 282.74 = 147.89 : x
  2. Step 2: Convert to fraction form
    188.60/282.74 = 147.89/x
  3. Step 3: Cross multiply
    188.60x = 282.74 × 147.89
  4. Step 4: Simplify right side
    188.60x = 41,812.27
  5. Step 5: Solve for x
    x = 41,812.27/188.60
  6. Step 6: Final answer
    x = 221.70

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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.