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Finding the Third Proportional to 551 and 842

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Solution

The third proportional to 551 and 842 is: 1,286.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    551 : 842 = 842 : x
  2. Step 2: Convert to fraction form
    551/842 = 842/x
  3. Step 3: Cross multiply
    551x = 842 × 842
  4. Step 4: Simplify right side
    551x = 708,964
  5. Step 5: Solve for x
    x = 708,964/551
  6. Step 6: Final answer
    x = 1,286.69

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These problems maintain the same ratio (1.53) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.