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Finding the Third Proportional to 305.06 and 486.19

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Solution

The third proportional to 305.06 and 486.19 is: 774.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    305.06 : 486.19 = 486.19 : x
  2. Step 2: Convert to fraction form
    305.06/486.19 = 486.19/x
  3. Step 3: Cross multiply
    305.06x = 486.19 × 486.19
  4. Step 4: Simplify right side
    305.06x = 236,378.29
  5. Step 5: Solve for x
    x = 236,378.29/305.06
  6. Step 6: Final answer
    x = 774.85

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Why These Related Problems?

These problems maintain the same ratio (1.59) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.