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Finding the Third Proportional to 401,178 and 874,311

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Solution

The third proportional to 401,178 and 874,311 is: 1,905,437.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    401,178 : 874,311 = 874,311 : x
  2. Step 2: Convert to fraction form
    401,178/874,311 = 874,311/x
  3. Step 3: Cross multiply
    401,178x = 874,311 × 874,311
  4. Step 4: Simplify right side
    401,178x = 764,419,724,721
  5. Step 5: Solve for x
    x = 764,419,724,721/401,178
  6. Step 6: Final answer
    x = 1,905,437.80

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.