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Finding the Third Proportional to 266,786 and 406,955

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Solution

The third proportional to 266,786 and 406,955 is: 620,768.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,786 : 406,955 = 406,955 : x
  2. Step 2: Convert to fraction form
    266,786/406,955 = 406,955/x
  3. Step 3: Cross multiply
    266,786x = 406,955 × 406,955
  4. Step 4: Simplify right side
    266,786x = 165,612,372,025
  5. Step 5: Solve for x
    x = 165,612,372,025/266,786
  6. Step 6: Final answer
    x = 620,768.60

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Why These Related Problems?

These problems maintain the same ratio (1.53) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.