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Finding the Fourth Proportional to 274.90, 411.55 and 216.10

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Solution

The fourth proportional to 274.90, 411.55 and 216.10 is: 323.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    274.90 : 411.55 = 216.10 : x
  2. Step 2: Convert to fraction form
    274.90/411.55 = 216.10/x
  3. Step 3: Cross multiply
    274.90x = 411.55 × 216.10
  4. Step 4: Simplify right side
    274.90x = 88,935.96
  5. Step 5: Solve for x
    x = 88,935.96/274.90
  6. Step 6: Final answer
    x = 323.52

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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.