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Finding the Third Proportional to 309.66 and 426.94

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Solution

The third proportional to 309.66 and 426.94 is: 588.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    309.66 : 426.94 = 426.94 : x
  2. Step 2: Convert to fraction form
    309.66/426.94 = 426.94/x
  3. Step 3: Cross multiply
    309.66x = 426.94 × 426.94
  4. Step 4: Simplify right side
    309.66x = 182,275.63
  5. Step 5: Solve for x
    x = 182,275.63/309.66
  6. Step 6: Final answer
    x = 588.64

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.