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Finding the Third Proportional to 131,658.75 and 290,209.50

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Solution

The third proportional to 131,658.75 and 290,209.50 is: 639,695.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,658.75 : 290,209.50 = 290,209.50 : x
  2. Step 2: Convert to fraction form
    131,658.75/290,209.50 = 290,209.50/x
  3. Step 3: Cross multiply
    131,658.75x = 290,209.50 × 290,209.50
  4. Step 4: Simplify right side
    131,658.75x = 84,221,553,890.25
  5. Step 5: Solve for x
    x = 84,221,553,890.25/131,658.75
  6. Step 6: Final answer
    x = 639,695.83

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Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.