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Finding the Third Proportional to 210,362 and 317,721

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Solution

The third proportional to 210,362 and 317,721 is: 479,871.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,362 : 317,721 = 317,721 : x
  2. Step 2: Convert to fraction form
    210,362/317,721 = 317,721/x
  3. Step 3: Cross multiply
    210,362x = 317,721 × 317,721
  4. Step 4: Simplify right side
    210,362x = 100,946,633,841
  5. Step 5: Solve for x
    x = 100,946,633,841/210,362
  6. Step 6: Final answer
    x = 479,871.05

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.