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Finding the Third Proportional to 217,490 and 306,270

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Solution

The third proportional to 217,490 and 306,270 is: 431,290.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,490 : 306,270 = 306,270 : x
  2. Step 2: Convert to fraction form
    217,490/306,270 = 306,270/x
  3. Step 3: Cross multiply
    217,490x = 306,270 × 306,270
  4. Step 4: Simplify right side
    217,490x = 93,801,312,900
  5. Step 5: Solve for x
    x = 93,801,312,900/217,490
  6. Step 6: Final answer
    x = 431,290.23

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Why These Related Problems?

These problems maintain the same ratio (1.41) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.