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Finding the Third Proportional to 1,539 and 3,385.55

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Solution

The third proportional to 1,539 and 3,385.55 is: 7,447.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,539 : 3,385.55 = 3,385.55 : x
  2. Step 2: Convert to fraction form
    1,539/3,385.55 = 3,385.55/x
  3. Step 3: Cross multiply
    1,539x = 3,385.55 × 3,385.55
  4. Step 4: Simplify right side
    1,539x = 11,461,927.64
  5. Step 5: Solve for x
    x = 11,461,927.64/1,539
  6. Step 6: Final answer
    x = 7,447.65

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Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.