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Finding the Third Proportional to 194,690 and 422,428

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Solution

The third proportional to 194,690 and 422,428 is: 916,561.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    194,690 : 422,428 = 422,428 : x
  2. Step 2: Convert to fraction form
    194,690/422,428 = 422,428/x
  3. Step 3: Cross multiply
    194,690x = 422,428 × 422,428
  4. Step 4: Simplify right side
    194,690x = 178,445,415,184
  5. Step 5: Solve for x
    x = 178,445,415,184/194,690
  6. Step 6: Final answer
    x = 916,561.79

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.