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Finding the Third Proportional to 90,428 and 196,423

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Solution

The third proportional to 90,428 and 196,423 is: 426,659.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,428 : 196,423 = 196,423 : x
  2. Step 2: Convert to fraction form
    90,428/196,423 = 196,423/x
  3. Step 3: Cross multiply
    90,428x = 196,423 × 196,423
  4. Step 4: Simplify right side
    90,428x = 38,581,994,929
  5. Step 5: Solve for x
    x = 38,581,994,929/90,428
  6. Step 6: Final answer
    x = 426,659.83

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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.