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Finding the Fourth Proportional to 200.51, 276.67 and 138.49

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Solution

The fourth proportional to 200.51, 276.67 and 138.49 is: 191.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    200.51 : 276.67 = 138.49 : x
  2. Step 2: Convert to fraction form
    200.51/276.67 = 138.49/x
  3. Step 3: Cross multiply
    200.51x = 276.67 × 138.49
  4. Step 4: Simplify right side
    200.51x = 38,316.03
  5. Step 5: Solve for x
    x = 38,316.03/200.51
  6. Step 6: Final answer
    x = 191.09

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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.