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Finding the Third Proportional to 418.50 and 848.39

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Solution

The third proportional to 418.50 and 848.39 is: 1,719.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    418.50 : 848.39 = 848.39 : x
  2. Step 2: Convert to fraction form
    418.50/848.39 = 848.39/x
  3. Step 3: Cross multiply
    418.50x = 848.39 × 848.39
  4. Step 4: Simplify right side
    418.50x = 719,766.65
  5. Step 5: Solve for x
    x = 719,766.65/418.50
  6. Step 6: Final answer
    x = 1,719.87

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Why These Related Problems?

These problems maintain the same ratio (2.03) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.