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Finding the Third Proportional to 218,700 and 330,986.25

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Solution

The third proportional to 218,700 and 330,986.25 is: 500,923.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,700 : 330,986.25 = 330,986.25 : x
  2. Step 2: Convert to fraction form
    218,700/330,986.25 = 330,986.25/x
  3. Step 3: Cross multiply
    218,700x = 330,986.25 × 330,986.25
  4. Step 4: Simplify right side
    218,700x = 109,551,897,689.06
  5. Step 5: Solve for x
    x = 109,551,897,689.06/218,700
  6. Step 6: Final answer
    x = 500,923.17

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.