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Finding the Third Proportional to 209,088 and 318,544

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Solution

The third proportional to 209,088 and 318,544 is: 485,299.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,088 : 318,544 = 318,544 : x
  2. Step 2: Convert to fraction form
    209,088/318,544 = 318,544/x
  3. Step 3: Cross multiply
    209,088x = 318,544 × 318,544
  4. Step 4: Simplify right side
    209,088x = 101,470,279,936
  5. Step 5: Solve for x
    x = 101,470,279,936/209,088
  6. Step 6: Final answer
    x = 485,299.40

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Why These Related Problems?

These problems maintain the same ratio (1.52) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.