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Finding the Third Proportional to 218,308 and 347,145

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Solution

The third proportional to 218,308 and 347,145 is: 552,016.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,308 : 347,145 = 347,145 : x
  2. Step 2: Convert to fraction form
    218,308/347,145 = 347,145/x
  3. Step 3: Cross multiply
    218,308x = 347,145 × 347,145
  4. Step 4: Simplify right side
    218,308x = 120,509,651,025
  5. Step 5: Solve for x
    x = 120,509,651,025/218,308
  6. Step 6: Final answer
    x = 552,016.65

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Why These Related Problems?

These problems maintain the same ratio (1.59) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.