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Finding the Third Proportional to 185,412 and 400,389

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Solution

The third proportional to 185,412 and 400,389 is: 864,622.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    185,412 : 400,389 = 400,389 : x
  2. Step 2: Convert to fraction form
    185,412/400,389 = 400,389/x
  3. Step 3: Cross multiply
    185,412x = 400,389 × 400,389
  4. Step 4: Simplify right side
    185,412x = 160,311,351,321
  5. Step 5: Solve for x
    x = 160,311,351,321/185,412
  6. Step 6: Final answer
    x = 864,622.31

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.