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Finding the Third Proportional to 1,485 and 2,308.75

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Solution

The third proportional to 1,485 and 2,308.75 is: 3,589.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,485 : 2,308.75 = 2,308.75 : x
  2. Step 2: Convert to fraction form
    1,485/2,308.75 = 2,308.75/x
  3. Step 3: Cross multiply
    1,485x = 2,308.75 × 2,308.75
  4. Step 4: Simplify right side
    1,485x = 5,330,326.56
  5. Step 5: Solve for x
    x = 5,330,326.56/1,485
  6. Step 6: Final answer
    x = 3,589.45

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.