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Finding the Third Proportional to 188,816 and 407,128

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Solution

The third proportional to 188,816 and 407,128 is: 877,855.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    188,816 : 407,128 = 407,128 : x
  2. Step 2: Convert to fraction form
    188,816/407,128 = 407,128/x
  3. Step 3: Cross multiply
    188,816x = 407,128 × 407,128
  4. Step 4: Simplify right side
    188,816x = 165,753,208,384
  5. Step 5: Solve for x
    x = 165,753,208,384/188,816
  6. Step 6: Final answer
    x = 877,855.73

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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.