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Finding the Third Proportional to 870.19 and 1,644.19

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Solution

The third proportional to 870.19 and 1,644.19 is: 3,106.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    870.19 : 1,644.19 = 1,644.19 : x
  2. Step 2: Convert to fraction form
    870.19/1,644.19 = 1,644.19/x
  3. Step 3: Cross multiply
    870.19x = 1,644.19 × 1,644.19
  4. Step 4: Simplify right side
    870.19x = 2,703,352.54
  5. Step 5: Solve for x
    x = 2,703,352.54/870.19
  6. Step 6: Final answer
    x = 3,106.63

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Why These Related Problems?

These problems maintain the same ratio (1.89) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.