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Finding the Third Proportional to 4,215.38 and 6,488.44

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Solution

The third proportional to 4,215.38 and 6,488.44 is: 9,987.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,215.38 : 6,488.44 = 6,488.44 : x
  2. Step 2: Convert to fraction form
    4,215.38/6,488.44 = 6,488.44/x
  3. Step 3: Cross multiply
    4,215.38x = 6,488.44 × 6,488.44
  4. Step 4: Simplify right side
    4,215.38x = 42,099,821.19
  5. Step 5: Solve for x
    x = 42,099,821.19/4,215.38
  6. Step 6: Final answer
    x = 9,987.21

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Why These Related Problems?

These problems maintain the same ratio (1.54) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.