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Finding the Third Proportional to 276.50 and 434

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Solution

The third proportional to 276.50 and 434 is: 681.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    276.50 : 434 = 434 : x
  2. Step 2: Convert to fraction form
    276.50/434 = 434/x
  3. Step 3: Cross multiply
    276.50x = 434 × 434
  4. Step 4: Simplify right side
    276.50x = 188,356
  5. Step 5: Solve for x
    x = 188,356/276.50
  6. Step 6: Final answer
    x = 681.22

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These problems maintain the same ratio (1.57) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.