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Finding the Third Proportional to 211,820 and 312,802

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Solution

The third proportional to 211,820 and 312,802 is: 461,925.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,820 : 312,802 = 312,802 : x
  2. Step 2: Convert to fraction form
    211,820/312,802 = 312,802/x
  3. Step 3: Cross multiply
    211,820x = 312,802 × 312,802
  4. Step 4: Simplify right side
    211,820x = 97,845,091,204
  5. Step 5: Solve for x
    x = 97,845,091,204/211,820
  6. Step 6: Final answer
    x = 461,925.65

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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.