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Finding the Third Proportional to 641.25 and 1,715.63

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Solution

The third proportional to 641.25 and 1,715.63 is: 4,590.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    641.25 : 1,715.63 = 1,715.63 : x
  2. Step 2: Convert to fraction form
    641.25/1,715.63 = 1,715.63/x
  3. Step 3: Cross multiply
    641.25x = 1,715.63 × 1,715.63
  4. Step 4: Simplify right side
    641.25x = 2,943,369.14
  5. Step 5: Solve for x
    x = 2,943,369.14/641.25
  6. Step 6: Final answer
    x = 4,590.05

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Why These Related Problems?

These problems maintain the same ratio (2.68) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.