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Finding the Third Proportional to 131,780 and 289,804

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Solution

The third proportional to 131,780 and 289,804 is: 637,322.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,780 : 289,804 = 289,804 : x
  2. Step 2: Convert to fraction form
    131,780/289,804 = 289,804/x
  3. Step 3: Cross multiply
    131,780x = 289,804 × 289,804
  4. Step 4: Simplify right side
    131,780x = 83,986,358,416
  5. Step 5: Solve for x
    x = 83,986,358,416/131,780
  6. Step 6: Final answer
    x = 637,322.50

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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.