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Finding the Fourth Proportional to 300.94, 451.56 and 138.66

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Solution

The fourth proportional to 300.94, 451.56 and 138.66 is: 208.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    300.94 : 451.56 = 138.66 : x
  2. Step 2: Convert to fraction form
    300.94/451.56 = 138.66/x
  3. Step 3: Cross multiply
    300.94x = 451.56 × 138.66
  4. Step 4: Simplify right side
    300.94x = 62,613.31
  5. Step 5: Solve for x
    x = 62,613.31/300.94
  6. Step 6: Final answer
    x = 208.06

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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.