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Finding the Third Proportional to 244.55 and 389.67

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Solution

The third proportional to 244.55 and 389.67 is: 620.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    244.55 : 389.67 = 389.67 : x
  2. Step 2: Convert to fraction form
    244.55/389.67 = 389.67/x
  3. Step 3: Cross multiply
    244.55x = 389.67 × 389.67
  4. Step 4: Simplify right side
    244.55x = 151,844.17
  5. Step 5: Solve for x
    x = 151,844.17/244.55
  6. Step 6: Final answer
    x = 620.92

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Why These Related Problems?

These problems maintain the same ratio (1.59) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.