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Finding the Third Proportional to 212.63 and 331.13

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Solution

The third proportional to 212.63 and 331.13 is: 515.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    212.63 : 331.13 = 331.13 : x
  2. Step 2: Convert to fraction form
    212.63/331.13 = 331.13/x
  3. Step 3: Cross multiply
    212.63x = 331.13 × 331.13
  4. Step 4: Simplify right side
    212.63x = 109,643.77
  5. Step 5: Solve for x
    x = 109,643.77/212.63
  6. Step 6: Final answer
    x = 515.67

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Why These Related Problems?

These problems maintain the same ratio (1.56) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.