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Finding the Third Proportional to 780.05 and 1,684.55

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Solution

The third proportional to 780.05 and 1,684.55 is: 3,637.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    780.05 : 1,684.55 = 1,684.55 : x
  2. Step 2: Convert to fraction form
    780.05/1,684.55 = 1,684.55/x
  3. Step 3: Cross multiply
    780.05x = 1,684.55 × 1,684.55
  4. Step 4: Simplify right side
    780.05x = 2,837,698.17
  5. Step 5: Solve for x
    x = 2,837,698.17/780.05
  6. Step 6: Final answer
    x = 3,637.86

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.