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Finding the Third Proportional to 987.19 and 1,435.22

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Solution

The third proportional to 987.19 and 1,435.22 is: 2,086.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    987.19 : 1,435.22 = 1,435.22 : x
  2. Step 2: Convert to fraction form
    987.19/1,435.22 = 1,435.22/x
  3. Step 3: Cross multiply
    987.19x = 1,435.22 × 1,435.22
  4. Step 4: Simplify right side
    987.19x = 2,059,852.86
  5. Step 5: Solve for x
    x = 2,059,852.86/987.19
  6. Step 6: Final answer
    x = 2,086.59

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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.