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Finding the Fourth Proportional to 189.36, 284.00 and 67.64

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Solution

The fourth proportional to 189.36, 284.00 and 67.64 is: 101.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    189.36 : 284.00 = 67.64 : x
  2. Step 2: Convert to fraction form
    189.36/284.00 = 67.64/x
  3. Step 3: Cross multiply
    189.36x = 284.00 × 67.64
  4. Step 4: Simplify right side
    189.36x = 19,208.00
  5. Step 5: Solve for x
    x = 19,208.00/189.36
  6. Step 6: Final answer
    x = 101.44

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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.