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Finding the Fourth Proportional to 200.48, 300.65 and 92.21

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Solution

The fourth proportional to 200.48, 300.65 and 92.21 is: 138.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    200.48 : 300.65 = 92.21 : x
  2. Step 2: Convert to fraction form
    200.48/300.65 = 92.21/x
  3. Step 3: Cross multiply
    200.48x = 300.65 × 92.21
  4. Step 4: Simplify right side
    200.48x = 27,720.97
  5. Step 5: Solve for x
    x = 27,720.97/200.48
  6. Step 6: Final answer
    x = 138.28

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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.