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Finding the Fourth Proportional to 301.34, 451.85 and 138.88

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Solution

The fourth proportional to 301.34, 451.85 and 138.88 is: 208.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    301.34 : 451.85 = 138.88 : x
  2. Step 2: Convert to fraction form
    301.34/451.85 = 138.88/x
  3. Step 3: Cross multiply
    301.34x = 451.85 × 138.88
  4. Step 4: Simplify right side
    301.34x = 62,749.97
  5. Step 5: Solve for x
    x = 62,749.97/301.34
  6. Step 6: Final answer
    x = 208.24

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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.