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Finding the Fourth Proportional to 274.96, 411.80 and 144.64

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Solution

The fourth proportional to 274.96, 411.80 and 144.64 is: 216.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    274.96 : 411.80 = 144.64 : x
  2. Step 2: Convert to fraction form
    274.96/411.80 = 144.64/x
  3. Step 3: Cross multiply
    274.96x = 411.80 × 144.64
  4. Step 4: Simplify right side
    274.96x = 59,562.75
  5. Step 5: Solve for x
    x = 59,562.75/274.96
  6. Step 6: Final answer
    x = 216.62

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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.