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Finding the Third Proportional to 310,790.25 and 438,679.50

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Solution

The third proportional to 310,790.25 and 438,679.50 is: 619,194.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,790.25 : 438,679.50 = 438,679.50 : x
  2. Step 2: Convert to fraction form
    310,790.25/438,679.50 = 438,679.50/x
  3. Step 3: Cross multiply
    310,790.25x = 438,679.50 × 438,679.50
  4. Step 4: Simplify right side
    310,790.25x = 192,439,703,720.25
  5. Step 5: Solve for x
    x = 192,439,703,720.25/310,790.25
  6. Step 6: Final answer
    x = 619,194.79

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Why These Related Problems?

These problems maintain the same ratio (1.41) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.