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Finding the Fourth Proportional to 274.79, 379.58 and 219.91

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Solution

The fourth proportional to 274.79, 379.58 and 219.91 is: 303.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    274.79 : 379.58 = 219.91 : x
  2. Step 2: Convert to fraction form
    274.79/379.58 = 219.91/x
  3. Step 3: Cross multiply
    274.79x = 379.58 × 219.91
  4. Step 4: Simplify right side
    274.79x = 83,473.44
  5. Step 5: Solve for x
    x = 83,473.44/274.79
  6. Step 6: Final answer
    x = 303.77

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.