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Finding the Third Proportional to 438.06 and 518.06

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Solution

The third proportional to 438.06 and 518.06 is: 612.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    438.06 : 518.06 = 518.06 : x
  2. Step 2: Convert to fraction form
    438.06/518.06 = 518.06/x
  3. Step 3: Cross multiply
    438.06x = 518.06 × 518.06
  4. Step 4: Simplify right side
    438.06x = 268,388.75
  5. Step 5: Solve for x
    x = 268,388.75/438.06
  6. Step 6: Final answer
    x = 612.67

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Why These Related Problems?

These problems maintain the same ratio (1.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.