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Finding the Third Proportional to 217,786 and 336,480

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Solution

The third proportional to 217,786 and 336,480 is: 519,862.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,786 : 336,480 = 336,480 : x
  2. Step 2: Convert to fraction form
    217,786/336,480 = 336,480/x
  3. Step 3: Cross multiply
    217,786x = 336,480 × 336,480
  4. Step 4: Simplify right side
    217,786x = 113,218,790,400
  5. Step 5: Solve for x
    x = 113,218,790,400/217,786
  6. Step 6: Final answer
    x = 519,862.57

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.