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Finding the Third Proportional to 199.34 and 427.15

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Solution

The third proportional to 199.34 and 427.15 is: 915.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    199.34 : 427.15 = 427.15 : x
  2. Step 2: Convert to fraction form
    199.34/427.15 = 427.15/x
  3. Step 3: Cross multiply
    199.34x = 427.15 × 427.15
  4. Step 4: Simplify right side
    199.34x = 182,455.79
  5. Step 5: Solve for x
    x = 182,455.79/199.34
  6. Step 6: Final answer
    x = 915.32

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Why These Related Problems?

These problems maintain the same ratio (2.14) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.