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Finding the Third Proportional to 212,098 and 457,405

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Solution

The third proportional to 212,098 and 457,405 is: 986,427.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,098 : 457,405 = 457,405 : x
  2. Step 2: Convert to fraction form
    212,098/457,405 = 457,405/x
  3. Step 3: Cross multiply
    212,098x = 457,405 × 457,405
  4. Step 4: Simplify right side
    212,098x = 209,219,334,025
  5. Step 5: Solve for x
    x = 209,219,334,025/212,098
  6. Step 6: Final answer
    x = 986,427.66

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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.