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Finding the Third Proportional to 508,720.50 and 690,909.75

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Solution

The third proportional to 508,720.50 and 690,909.75 is: 938,346.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    508,720.50 : 690,909.75 = 690,909.75 : x
  2. Step 2: Convert to fraction form
    508,720.50/690,909.75 = 690,909.75/x
  3. Step 3: Cross multiply
    508,720.50x = 690,909.75 × 690,909.75
  4. Step 4: Simplify right side
    508,720.50x = 477,356,282,645.06
  5. Step 5: Solve for x
    x = 477,356,282,645.06/508,720.50
  6. Step 6: Final answer
    x = 938,346.86

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Why These Related Problems?

These problems maintain the same ratio (1.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.