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Finding the Third Proportional to 336,620 and 491,909

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Solution

The third proportional to 336,620 and 491,909 is: 718,835.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    336,620 : 491,909 = 491,909 : x
  2. Step 2: Convert to fraction form
    336,620/491,909 = 491,909/x
  3. Step 3: Cross multiply
    336,620x = 491,909 × 491,909
  4. Step 4: Simplify right side
    336,620x = 241,974,464,281
  5. Step 5: Solve for x
    x = 241,974,464,281/336,620
  6. Step 6: Final answer
    x = 718,835.67

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Why These Related Problems?

These problems maintain the same ratio (1.46) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.