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Finding the Fourth Proportional to 189.26, 282.84 and 140.62

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Solution

The fourth proportional to 189.26, 282.84 and 140.62 is: 210.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    189.26 : 282.84 = 140.62 : x
  2. Step 2: Convert to fraction form
    189.26/282.84 = 140.62/x
  3. Step 3: Cross multiply
    189.26x = 282.84 × 140.62
  4. Step 4: Simplify right side
    189.26x = 39,772.96
  5. Step 5: Solve for x
    x = 39,772.96/189.26
  6. Step 6: Final answer
    x = 210.15

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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.