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Finding the Fourth Proportional to 188.30, 282.67 and 139.41

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Solution

The fourth proportional to 188.30, 282.67 and 139.41 is: 209.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    188.30 : 282.67 = 139.41 : x
  2. Step 2: Convert to fraction form
    188.30/282.67 = 139.41/x
  3. Step 3: Cross multiply
    188.30x = 282.67 × 139.41
  4. Step 4: Simplify right side
    188.30x = 39,406.68
  5. Step 5: Solve for x
    x = 39,406.68/188.30
  6. Step 6: Final answer
    x = 209.27

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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.