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Finding the Third Proportional to 438.50 and 656

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Solution

The third proportional to 438.50 and 656 is: 981.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    438.50 : 656 = 656 : x
  2. Step 2: Convert to fraction form
    438.50/656 = 656/x
  3. Step 3: Cross multiply
    438.50x = 656 × 656
  4. Step 4: Simplify right side
    438.50x = 430,336
  5. Step 5: Solve for x
    x = 430,336/438.50
  6. Step 6: Final answer
    x = 981.38

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.