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Finding the Third Proportional to 211,824 and 312,808

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Solution

The third proportional to 211,824 and 312,808 is: 461,934.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,824 : 312,808 = 312,808 : x
  2. Step 2: Convert to fraction form
    211,824/312,808 = 312,808/x
  3. Step 3: Cross multiply
    211,824x = 312,808 × 312,808
  4. Step 4: Simplify right side
    211,824x = 97,848,844,864
  5. Step 5: Solve for x
    x = 97,848,844,864/211,824
  6. Step 6: Final answer
    x = 461,934.65

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Why These Related Problems?

These problems maintain the same ratio (1.48) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.