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Finding the Third Proportional to 1,290.94 and 1,875.66

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Solution

The third proportional to 1,290.94 and 1,875.66 is: 2,725.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,290.94 : 1,875.66 = 1,875.66 : x
  2. Step 2: Convert to fraction form
    1,290.94/1,875.66 = 1,875.66/x
  3. Step 3: Cross multiply
    1,290.94x = 1,875.66 × 1,875.66
  4. Step 4: Simplify right side
    1,290.94x = 3,518,086.37
  5. Step 5: Solve for x
    x = 3,518,086.37/1,290.94
  6. Step 6: Final answer
    x = 2,725.22

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Why These Related Problems?

These problems maintain the same ratio (1.45) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.