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Finding the Third Proportional to 211,778 and 328,049

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Solution

The third proportional to 211,778 and 328,049 is: 508,155.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,778 : 328,049 = 328,049 : x
  2. Step 2: Convert to fraction form
    211,778/328,049 = 328,049/x
  3. Step 3: Cross multiply
    211,778x = 328,049 × 328,049
  4. Step 4: Simplify right side
    211,778x = 107,616,146,401
  5. Step 5: Solve for x
    x = 107,616,146,401/211,778
  6. Step 6: Final answer
    x = 508,155.46

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.