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Finding the Third Proportional to 1,539 and 3,319.31

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Solution

The third proportional to 1,539 and 3,319.31 is: 7,159.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,539 : 3,319.31 = 3,319.31 : x
  2. Step 2: Convert to fraction form
    1,539/3,319.31 = 3,319.31/x
  3. Step 3: Cross multiply
    1,539x = 3,319.31 × 3,319.31
  4. Step 4: Simplify right side
    1,539x = 11,017,835.47
  5. Step 5: Solve for x
    x = 11,017,835.47/1,539
  6. Step 6: Final answer
    x = 7,159.09

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.