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Finding the Fourth Proportional to 277.61, 383.09 and 161.19

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Solution

The fourth proportional to 277.61, 383.09 and 161.19 is: 222.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    277.61 : 383.09 = 161.19 : x
  2. Step 2: Convert to fraction form
    277.61/383.09 = 161.19/x
  3. Step 3: Cross multiply
    277.61x = 383.09 × 161.19
  4. Step 4: Simplify right side
    277.61x = 61,749.47
  5. Step 5: Solve for x
    x = 61,749.47/277.61
  6. Step 6: Final answer
    x = 222.44

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.