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Finding the Third Proportional to 411,055.50 and 645,723

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Solution

The third proportional to 411,055.50 and 645,723 is: 1,014,359.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    411,055.50 : 645,723 = 645,723 : x
  2. Step 2: Convert to fraction form
    411,055.50/645,723 = 645,723/x
  3. Step 3: Cross multiply
    411,055.50x = 645,723 × 645,723
  4. Step 4: Simplify right side
    411,055.50x = 416,958,192,729
  5. Step 5: Solve for x
    x = 416,958,192,729/411,055.50
  6. Step 6: Final answer
    x = 1,014,359.84

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Why These Related Problems?

These problems maintain the same ratio (1.57) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.