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Finding the Third Proportional to 321.19 and 498.94

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Solution

The third proportional to 321.19 and 498.94 is: 775.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    321.19 : 498.94 = 498.94 : x
  2. Step 2: Convert to fraction form
    321.19/498.94 = 498.94/x
  3. Step 3: Cross multiply
    321.19x = 498.94 × 498.94
  4. Step 4: Simplify right side
    321.19x = 248,938.63
  5. Step 5: Solve for x
    x = 248,938.63/321.19
  6. Step 6: Final answer
    x = 775.06

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.