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Finding the Fourth Proportional to 301.22, 451.43 and 138.55

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Solution

The fourth proportional to 301.22, 451.43 and 138.55 is: 207.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    301.22 : 451.43 = 138.55 : x
  2. Step 2: Convert to fraction form
    301.22/451.43 = 138.55/x
  3. Step 3: Cross multiply
    301.22x = 451.43 × 138.55
  4. Step 4: Simplify right side
    301.22x = 62,544.32
  5. Step 5: Solve for x
    x = 62,544.32/301.22
  6. Step 6: Final answer
    x = 207.63

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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.