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Finding the Fourth Proportional to 369.61, 554.06 and 138.44

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Solution

The fourth proportional to 369.61, 554.06 and 138.44 is: 207.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    369.61 : 554.06 = 138.44 : x
  2. Step 2: Convert to fraction form
    369.61/554.06 = 138.44/x
  3. Step 3: Cross multiply
    369.61x = 554.06 × 138.44
  4. Step 4: Simplify right side
    369.61x = 76,704.07
  5. Step 5: Solve for x
    x = 76,704.07/369.61
  6. Step 6: Final answer
    x = 207.53

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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.