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Finding the Fourth Proportional to 201.73, 278.51 and 189.32

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Solution

The fourth proportional to 201.73, 278.51 and 189.32 is: 261.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    201.73 : 278.51 = 189.32 : x
  2. Step 2: Convert to fraction form
    201.73/278.51 = 189.32/x
  3. Step 3: Cross multiply
    201.73x = 278.51 × 189.32
  4. Step 4: Simplify right side
    201.73x = 52,727.51
  5. Step 5: Solve for x
    x = 52,727.51/201.73
  6. Step 6: Final answer
    x = 261.38

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.