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Finding the Fourth Proportional to 369.44, 554.18 and 138.27

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Solution

The fourth proportional to 369.44, 554.18 and 138.27 is: 207.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    369.44 : 554.18 = 138.27 : x
  2. Step 2: Convert to fraction form
    369.44/554.18 = 138.27/x
  3. Step 3: Cross multiply
    369.44x = 554.18 × 138.27
  4. Step 4: Simplify right side
    369.44x = 76,625.78
  5. Step 5: Solve for x
    x = 76,625.78/369.44
  6. Step 6: Final answer
    x = 207.41

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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.