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Finding the Fourth Proportional to 274.02, 410.28 and 212.88

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Solution

The fourth proportional to 274.02, 410.28 and 212.88 is: 318.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    274.02 : 410.28 = 212.88 : x
  2. Step 2: Convert to fraction form
    274.02/410.28 = 212.88/x
  3. Step 3: Cross multiply
    274.02x = 410.28 × 212.88
  4. Step 4: Simplify right side
    274.02x = 87,340.41
  5. Step 5: Solve for x
    x = 87,340.41/274.02
  6. Step 6: Final answer
    x = 318.74

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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.