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Finding the Fourth Proportional to 369.69, 554.41 and 126.15

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Solution

The fourth proportional to 369.69, 554.41 and 126.15 is: 189.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    369.69 : 554.41 = 126.15 : x
  2. Step 2: Convert to fraction form
    369.69/554.41 = 126.15/x
  3. Step 3: Cross multiply
    369.69x = 554.41 × 126.15
  4. Step 4: Simplify right side
    369.69x = 69,938.82
  5. Step 5: Solve for x
    x = 69,938.82/369.69
  6. Step 6: Final answer
    x = 189.18

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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.