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Finding the Third Proportional to 98,724 and 213,209

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Solution

The third proportional to 98,724 and 213,209 is: 460,456.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,724 : 213,209 = 213,209 : x
  2. Step 2: Convert to fraction form
    98,724/213,209 = 213,209/x
  3. Step 3: Cross multiply
    98,724x = 213,209 × 213,209
  4. Step 4: Simplify right side
    98,724x = 45,458,077,681
  5. Step 5: Solve for x
    x = 45,458,077,681/98,724
  6. Step 6: Final answer
    x = 460,456.20

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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.