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Finding the Fourth Proportional to 200.99, 277.33 and 121.22

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Solution

The fourth proportional to 200.99, 277.33 and 121.22 is: 167.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    200.99 : 277.33 = 121.22 : x
  2. Step 2: Convert to fraction form
    200.99/277.33 = 121.22/x
  3. Step 3: Cross multiply
    200.99x = 277.33 × 121.22
  4. Step 4: Simplify right side
    200.99x = 33,615.95
  5. Step 5: Solve for x
    x = 33,615.95/200.99
  6. Step 6: Final answer
    x = 167.26

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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.