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Finding the Third Proportional to 218,315 and 328,283

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Solution

The third proportional to 218,315 and 328,283 is: 493,643.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,315 : 328,283 = 328,283 : x
  2. Step 2: Convert to fraction form
    218,315/328,283 = 328,283/x
  3. Step 3: Cross multiply
    218,315x = 328,283 × 328,283
  4. Step 4: Simplify right side
    218,315x = 107,769,728,089
  5. Step 5: Solve for x
    x = 107,769,728,089/218,315
  6. Step 6: Final answer
    x = 493,643.26

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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.