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Finding the Third Proportional to 218,708 and 357,126

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Solution

The third proportional to 218,708 and 357,126 is: 583,147.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,708 : 357,126 = 357,126 : x
  2. Step 2: Convert to fraction form
    218,708/357,126 = 357,126/x
  3. Step 3: Cross multiply
    218,708x = 357,126 × 357,126
  4. Step 4: Simplify right side
    218,708x = 127,538,979,876
  5. Step 5: Solve for x
    x = 127,538,979,876/218,708
  6. Step 6: Final answer
    x = 583,147.30

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Why These Related Problems?

These problems maintain the same ratio (1.63) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.