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Finding the Third Proportional to 392,935.50 and 642,303

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Solution

The third proportional to 392,935.50 and 642,303 is: 1,049,925.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,935.50 : 642,303 = 642,303 : x
  2. Step 2: Convert to fraction form
    392,935.50/642,303 = 642,303/x
  3. Step 3: Cross multiply
    392,935.50x = 642,303 × 642,303
  4. Step 4: Simplify right side
    392,935.50x = 412,553,143,809
  5. Step 5: Solve for x
    x = 412,553,143,809/392,935.50
  6. Step 6: Final answer
    x = 1,049,925.86

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Why These Related Problems?

These problems maintain the same ratio (1.63) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.