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Finding the Third Proportional to 211,156.50 and 439,728

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Solution

The third proportional to 211,156.50 and 439,728 is: 915,722.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,156.50 : 439,728 = 439,728 : x
  2. Step 2: Convert to fraction form
    211,156.50/439,728 = 439,728/x
  3. Step 3: Cross multiply
    211,156.50x = 439,728 × 439,728
  4. Step 4: Simplify right side
    211,156.50x = 193,360,713,984
  5. Step 5: Solve for x
    x = 193,360,713,984/211,156.50
  6. Step 6: Final answer
    x = 915,722.29

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Why These Related Problems?

These problems maintain the same ratio (2.08) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.