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Finding the Third Proportional to 815.81 and 1,720.88

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Solution

The third proportional to 815.81 and 1,720.88 is: 3,630.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    815.81 : 1,720.88 = 1,720.88 : x
  2. Step 2: Convert to fraction form
    815.81/1,720.88 = 1,720.88/x
  3. Step 3: Cross multiply
    815.81x = 1,720.88 × 1,720.88
  4. Step 4: Simplify right side
    815.81x = 2,961,410.77
  5. Step 5: Solve for x
    x = 2,961,410.77/815.81
  6. Step 6: Final answer
    x = 3,630.01

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Why These Related Problems?

These problems maintain the same ratio (2.11) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.