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Finding the Third Proportional to 138,506 and 297,700

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Solution

The third proportional to 138,506 and 297,700 is: 639,866.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,506 : 297,700 = 297,700 : x
  2. Step 2: Convert to fraction form
    138,506/297,700 = 297,700/x
  3. Step 3: Cross multiply
    138,506x = 297,700 × 297,700
  4. Step 4: Simplify right side
    138,506x = 88,625,290,000
  5. Step 5: Solve for x
    x = 88,625,290,000/138,506
  6. Step 6: Final answer
    x = 639,866.07

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.