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Finding the Fourth Proportional to 551.06, 826.60 and 161.09

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Solution

The fourth proportional to 551.06, 826.60 and 161.09 is: 241.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    551.06 : 826.60 = 161.09 : x
  2. Step 2: Convert to fraction form
    551.06/826.60 = 161.09/x
  3. Step 3: Cross multiply
    551.06x = 826.60 × 161.09
  4. Step 4: Simplify right side
    551.06x = 133,156.99
  5. Step 5: Solve for x
    x = 133,156.99/551.06
  6. Step 6: Final answer
    x = 241.64

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.