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Finding the Third Proportional to 291,178 and 617,343

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Solution

The third proportional to 291,178 and 617,343 is: 1,308,863.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,178 : 617,343 = 617,343 : x
  2. Step 2: Convert to fraction form
    291,178/617,343 = 617,343/x
  3. Step 3: Cross multiply
    291,178x = 617,343 × 617,343
  4. Step 4: Simplify right side
    291,178x = 381,112,379,649
  5. Step 5: Solve for x
    x = 381,112,379,649/291,178
  6. Step 6: Final answer
    x = 1,308,863.92

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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.