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Finding the Third Proportional to 217,792 and 336,490

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Solution

The third proportional to 217,792 and 336,490 is: 519,879.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,792 : 336,490 = 336,490 : x
  2. Step 2: Convert to fraction form
    217,792/336,490 = 336,490/x
  3. Step 3: Cross multiply
    217,792x = 336,490 × 336,490
  4. Step 4: Simplify right side
    217,792x = 113,225,520,100
  5. Step 5: Solve for x
    x = 113,225,520,100/217,792
  6. Step 6: Final answer
    x = 519,879.15

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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.