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Finding the Third Proportional to 423,803 and 640,025

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Solution

The third proportional to 423,803 and 640,025 is: 966,562.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,803 : 640,025 = 640,025 : x
  2. Step 2: Convert to fraction form
    423,803/640,025 = 640,025/x
  3. Step 3: Cross multiply
    423,803x = 640,025 × 640,025
  4. Step 4: Simplify right side
    423,803x = 409,632,000,625
  5. Step 5: Solve for x
    x = 409,632,000,625/423,803
  6. Step 6: Final answer
    x = 966,562.30

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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.