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Finding the Third Proportional to 223,260 and 312,286

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Solution

The third proportional to 223,260 and 312,286 is: 436,811.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,260 : 312,286 = 312,286 : x
  2. Step 2: Convert to fraction form
    223,260/312,286 = 312,286/x
  3. Step 3: Cross multiply
    223,260x = 312,286 × 312,286
  4. Step 4: Simplify right side
    223,260x = 97,522,545,796
  5. Step 5: Solve for x
    x = 97,522,545,796/223,260
  6. Step 6: Final answer
    x = 436,811.55

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.