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Finding the Third Proportional to 164,215 and 355,417

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Solution

The third proportional to 164,215 and 355,417 is: 769,243.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    164,215 : 355,417 = 355,417 : x
  2. Step 2: Convert to fraction form
    164,215/355,417 = 355,417/x
  3. Step 3: Cross multiply
    164,215x = 355,417 × 355,417
  4. Step 4: Simplify right side
    164,215x = 126,321,243,889
  5. Step 5: Solve for x
    x = 126,321,243,889/164,215
  6. Step 6: Final answer
    x = 769,243.03

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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.