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Finding the Third Proportional to 291.94 and 353.53

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Solution

The third proportional to 291.94 and 353.53 is: 428.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    291.94 : 353.53 = 353.53 : x
  2. Step 2: Convert to fraction form
    291.94/353.53 = 353.53/x
  3. Step 3: Cross multiply
    291.94x = 353.53 × 353.53
  4. Step 4: Simplify right side
    291.94x = 124,984.34
  5. Step 5: Solve for x
    x = 124,984.34/291.94
  6. Step 6: Final answer
    x = 428.12

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Why These Related Problems?

These problems maintain the same ratio (1.21) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.