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Finding the Third Proportional to 316,730 and 672,322

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Solution

The third proportional to 316,730 and 672,322 is: 1,427,136.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,730 : 672,322 = 672,322 : x
  2. Step 2: Convert to fraction form
    316,730/672,322 = 672,322/x
  3. Step 3: Cross multiply
    316,730x = 672,322 × 672,322
  4. Step 4: Simplify right side
    316,730x = 452,016,871,684
  5. Step 5: Solve for x
    x = 452,016,871,684/316,730
  6. Step 6: Final answer
    x = 1,427,136.27

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Why These Related Problems?

These problems maintain the same ratio (2.12) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.