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Finding the Third Proportional to 363,389 and 509,217

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Solution

The third proportional to 363,389 and 509,217 is: 713,565.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    363,389 : 509,217 = 509,217 : x
  2. Step 2: Convert to fraction form
    363,389/509,217 = 509,217/x
  3. Step 3: Cross multiply
    363,389x = 509,217 × 509,217
  4. Step 4: Simplify right side
    363,389x = 259,301,953,089
  5. Step 5: Solve for x
    x = 259,301,953,089/363,389
  6. Step 6: Final answer
    x = 713,565.77

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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.