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Finding the Third Proportional to 90,300 and 213,180

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Solution

The third proportional to 90,300 and 213,180 is: 503,274.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,300 : 213,180 = 213,180 : x
  2. Step 2: Convert to fraction form
    90,300/213,180 = 213,180/x
  3. Step 3: Cross multiply
    90,300x = 213,180 × 213,180
  4. Step 4: Simplify right side
    90,300x = 45,445,712,400
  5. Step 5: Solve for x
    x = 45,445,712,400/90,300
  6. Step 6: Final answer
    x = 503,274.78

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Why These Related Problems?

These problems maintain the same ratio (2.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.