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Finding the Third Proportional to 320,931 and 496,685

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Solution

The third proportional to 320,931 and 496,685 is: 768,688.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    320,931 : 496,685 = 496,685 : x
  2. Step 2: Convert to fraction form
    320,931/496,685 = 496,685/x
  3. Step 3: Cross multiply
    320,931x = 496,685 × 496,685
  4. Step 4: Simplify right side
    320,931x = 246,695,989,225
  5. Step 5: Solve for x
    x = 246,695,989,225/320,931
  6. Step 6: Final answer
    x = 768,688.56

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.