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Finding the Third Proportional to 769.92 and 901.55

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Solution

The third proportional to 769.92 and 901.55 is: 1,055.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    769.92 : 901.55 = 901.55 : x
  2. Step 2: Convert to fraction form
    769.92/901.55 = 901.55/x
  3. Step 3: Cross multiply
    769.92x = 901.55 × 901.55
  4. Step 4: Simplify right side
    769.92x = 812,786.77
  5. Step 5: Solve for x
    x = 812,786.77/769.92
  6. Step 6: Final answer
    x = 1,055.67

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Why These Related Problems?

These problems maintain the same ratio (1.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.