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Finding the Third Proportional to 4,400 and 6,440

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Solution

The third proportional to 4,400 and 6,440 is: 9,425.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,400 : 6,440 = 6,440 : x
  2. Step 2: Convert to fraction form
    4,400/6,440 = 6,440/x
  3. Step 3: Cross multiply
    4,400x = 6,440 × 6,440
  4. Step 4: Simplify right side
    4,400x = 41,473,600
  5. Step 5: Solve for x
    x = 41,473,600/4,400
  6. Step 6: Final answer
    x = 9,425.82

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Why These Related Problems?

These problems maintain the same ratio (1.46) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.