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Finding the Fourth Proportional to 369.74, 554.46 and 215.97

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Solution

The fourth proportional to 369.74, 554.46 and 215.97 is: 323.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    369.74 : 554.46 = 215.97 : x
  2. Step 2: Convert to fraction form
    369.74/554.46 = 215.97/x
  3. Step 3: Cross multiply
    369.74x = 554.46 × 215.97
  4. Step 4: Simplify right side
    369.74x = 119,744.14
  5. Step 5: Solve for x
    x = 119,744.14/369.74
  6. Step 6: Final answer
    x = 323.86

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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.