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Finding the Third Proportional to 1,538.50 and 2,777

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Solution

The third proportional to 1,538.50 and 2,777 is: 5,012.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,538.50 : 2,777 = 2,777 : x
  2. Step 2: Convert to fraction form
    1,538.50/2,777 = 2,777/x
  3. Step 3: Cross multiply
    1,538.50x = 2,777 × 2,777
  4. Step 4: Simplify right side
    1,538.50x = 7,711,729
  5. Step 5: Solve for x
    x = 7,711,729/1,538.50
  6. Step 6: Final answer
    x = 5,012.50

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Why These Related Problems?

These problems maintain the same ratio (1.81) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.