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Finding the Fourth Proportional to 274.19, 411.62 and 212.68

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Solution

The fourth proportional to 274.19, 411.62 and 212.68 is: 319.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    274.19 : 411.62 = 212.68 : x
  2. Step 2: Convert to fraction form
    274.19/411.62 = 212.68/x
  3. Step 3: Cross multiply
    274.19x = 411.62 × 212.68
  4. Step 4: Simplify right side
    274.19x = 87,541.37
  5. Step 5: Solve for x
    x = 87,541.37/274.19
  6. Step 6: Final answer
    x = 319.28

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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.