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Finding the Third Proportional to 811.58 and 1,281.45

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Solution

The third proportional to 811.58 and 1,281.45 is: 2,023.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    811.58 : 1,281.45 = 1,281.45 : x
  2. Step 2: Convert to fraction form
    811.58/1,281.45 = 1,281.45/x
  3. Step 3: Cross multiply
    811.58x = 1,281.45 × 1,281.45
  4. Step 4: Simplify right side
    811.58x = 1,642,102.09
  5. Step 5: Solve for x
    x = 1,642,102.09/811.58
  6. Step 6: Final answer
    x = 2,023.33

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Why These Related Problems?

These problems maintain the same ratio (1.58) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.