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Finding the Third Proportional to 218.74 and 344.67

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Solution

The third proportional to 218.74 and 344.67 is: 543.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    218.74 : 344.67 = 344.67 : x
  2. Step 2: Convert to fraction form
    218.74/344.67 = 344.67/x
  3. Step 3: Cross multiply
    218.74x = 344.67 × 344.67
  4. Step 4: Simplify right side
    218.74x = 118,798.70
  5. Step 5: Solve for x
    x = 118,798.70/218.74
  6. Step 6: Final answer
    x = 543.10

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Why These Related Problems?

These problems maintain the same ratio (1.58) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.