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Finding the Fourth Proportional to 189.39, 284.07 and 67.65

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Solution

The fourth proportional to 189.39, 284.07 and 67.65 is: 101.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    189.39 : 284.07 = 67.65 : x
  2. Step 2: Convert to fraction form
    189.39/284.07 = 67.65/x
  3. Step 3: Cross multiply
    189.39x = 284.07 × 67.65
  4. Step 4: Simplify right side
    189.39x = 19,217.34
  5. Step 5: Solve for x
    x = 19,217.34/189.39
  6. Step 6: Final answer
    x = 101.47

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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.