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Finding the Third Proportional to 212,859 and 320,185.13

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Solution

The third proportional to 212,859 and 320,185.13 is: 481,626.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,859 : 320,185.13 = 320,185.13 : x
  2. Step 2: Convert to fraction form
    212,859/320,185.13 = 320,185.13/x
  3. Step 3: Cross multiply
    212,859x = 320,185.13 × 320,185.13
  4. Step 4: Simplify right side
    212,859x = 102,518,514,271.27
  5. Step 5: Solve for x
    x = 102,518,514,271.27/212,859
  6. Step 6: Final answer
    x = 481,626.40

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.