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Finding the Third Proportional to 508,509 and 690,612

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Solution

The third proportional to 508,509 and 690,612 is: 937,928.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    508,509 : 690,612 = 690,612 : x
  2. Step 2: Convert to fraction form
    508,509/690,612 = 690,612/x
  3. Step 3: Cross multiply
    508,509x = 690,612 × 690,612
  4. Step 4: Simplify right side
    508,509x = 476,944,934,544
  5. Step 5: Solve for x
    x = 476,944,934,544/508,509
  6. Step 6: Final answer
    x = 937,928.21

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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.