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Finding the Third Proportional to 291,162 and 617,316

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Solution

The third proportional to 291,162 and 617,316 is: 1,308,821.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,162 : 617,316 = 617,316 : x
  2. Step 2: Convert to fraction form
    291,162/617,316 = 617,316/x
  3. Step 3: Cross multiply
    291,162x = 617,316 × 617,316
  4. Step 4: Simplify right side
    291,162x = 381,079,043,856
  5. Step 5: Solve for x
    x = 381,079,043,856/291,162
  6. Step 6: Final answer
    x = 1,308,821.36

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Why These Related Problems?

These problems maintain the same ratio (2.12) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.