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Finding the Third Proportional to 217,220 and 336,340

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Solution

The third proportional to 217,220 and 336,340 is: 520,783.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,220 : 336,340 = 336,340 : x
  2. Step 2: Convert to fraction form
    217,220/336,340 = 336,340/x
  3. Step 3: Cross multiply
    217,220x = 336,340 × 336,340
  4. Step 4: Simplify right side
    217,220x = 113,124,595,600
  5. Step 5: Solve for x
    x = 113,124,595,600/217,220
  6. Step 6: Final answer
    x = 520,783.52

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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.