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Finding the Third Proportional to 120,431 and 250,420

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Solution

The third proportional to 120,431 and 250,420 is: 520,714.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,431 : 250,420 = 250,420 : x
  2. Step 2: Convert to fraction form
    120,431/250,420 = 250,420/x
  3. Step 3: Cross multiply
    120,431x = 250,420 × 250,420
  4. Step 4: Simplify right side
    120,431x = 62,710,176,400
  5. Step 5: Solve for x
    x = 62,710,176,400/120,431
  6. Step 6: Final answer
    x = 520,714.57

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Why These Related Problems?

These problems maintain the same ratio (2.08) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.