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Finding the Fourth Proportional to 369.43, 554.15 and 279.23

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Solution

The fourth proportional to 369.43, 554.15 and 279.23 is: 418.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    369.43 : 554.15 = 279.23 : x
  2. Step 2: Convert to fraction form
    369.43/554.15 = 279.23/x
  3. Step 3: Cross multiply
    369.43x = 554.15 × 279.23
  4. Step 4: Simplify right side
    369.43x = 154,733.23
  5. Step 5: Solve for x
    x = 154,733.23/369.43
  6. Step 6: Final answer
    x = 418.85

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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.