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Finding the Fourth Proportional to 276.53, 414.81 and 211.63

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Solution

The fourth proportional to 276.53, 414.81 and 211.63 is: 317.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    276.53 : 414.81 = 211.63 : x
  2. Step 2: Convert to fraction form
    276.53/414.81 = 211.63/x
  3. Step 3: Cross multiply
    276.53x = 414.81 × 211.63
  4. Step 4: Simplify right side
    276.53x = 87,784.17
  5. Step 5: Solve for x
    x = 87,784.17/276.53
  6. Step 6: Final answer
    x = 317.45

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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.