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Finding the Third Proportional to 213,020 and 323,420

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Solution

The third proportional to 213,020 and 323,420 is: 491,036.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,020 : 323,420 = 323,420 : x
  2. Step 2: Convert to fraction form
    213,020/323,420 = 323,420/x
  3. Step 3: Cross multiply
    213,020x = 323,420 × 323,420
  4. Step 4: Simplify right side
    213,020x = 104,600,496,400
  5. Step 5: Solve for x
    x = 104,600,496,400/213,020
  6. Step 6: Final answer
    x = 491,036.04

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Why These Related Problems?

These problems maintain the same ratio (1.52) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.