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Finding the Third Proportional to 389,222 and 828,664

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Solution

The third proportional to 389,222 and 828,664 is: 1,764,247.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,222 : 828,664 = 828,664 : x
  2. Step 2: Convert to fraction form
    389,222/828,664 = 828,664/x
  3. Step 3: Cross multiply
    389,222x = 828,664 × 828,664
  4. Step 4: Simplify right side
    389,222x = 686,684,024,896
  5. Step 5: Solve for x
    x = 686,684,024,896/389,222
  6. Step 6: Final answer
    x = 1,764,247.72

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Why These Related Problems?

These problems maintain the same ratio (2.13) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.