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Finding the Third Proportional to 776.50 and 1,629

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Solution

The third proportional to 776.50 and 1,629 is: 3,417.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    776.50 : 1,629 = 1,629 : x
  2. Step 2: Convert to fraction form
    776.50/1,629 = 1,629/x
  3. Step 3: Cross multiply
    776.50x = 1,629 × 1,629
  4. Step 4: Simplify right side
    776.50x = 2,653,641
  5. Step 5: Solve for x
    x = 2,653,641/776.50
  6. Step 6: Final answer
    x = 3,417.44

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Why These Related Problems?

These problems maintain the same ratio (2.10) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.