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Finding the Third Proportional to 163,318 and 256,643

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Solution

The third proportional to 163,318 and 256,643 is: 403,296.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    163,318 : 256,643 = 256,643 : x
  2. Step 2: Convert to fraction form
    163,318/256,643 = 256,643/x
  3. Step 3: Cross multiply
    163,318x = 256,643 × 256,643
  4. Step 4: Simplify right side
    163,318x = 65,865,629,449
  5. Step 5: Solve for x
    x = 65,865,629,449/163,318
  6. Step 6: Final answer
    x = 403,296.82

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Why These Related Problems?

These problems maintain the same ratio (1.57) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.