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Finding the Third Proportional to 189,681 and 406,422

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Solution

The third proportional to 189,681 and 406,422 is: 870,824.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,681 : 406,422 = 406,422 : x
  2. Step 2: Convert to fraction form
    189,681/406,422 = 406,422/x
  3. Step 3: Cross multiply
    189,681x = 406,422 × 406,422
  4. Step 4: Simplify right side
    189,681x = 165,178,842,084
  5. Step 5: Solve for x
    x = 165,178,842,084/189,681
  6. Step 6: Final answer
    x = 870,824.40

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Why These Related Problems?

These problems maintain the same ratio (2.14) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.