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Finding the Fourth Proportional to 274.68, 411.99 and 137.70

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Solution

The fourth proportional to 274.68, 411.99 and 137.70 is: 206.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    274.68 : 411.99 = 137.70 : x
  2. Step 2: Convert to fraction form
    274.68/411.99 = 137.70/x
  3. Step 3: Cross multiply
    274.68x = 411.99 × 137.70
  4. Step 4: Simplify right side
    274.68x = 56,731.02
  5. Step 5: Solve for x
    x = 56,731.02/274.68
  6. Step 6: Final answer
    x = 206.53

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.