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Finding the Fourth Proportional to 368.38, 552.45 and 121.60

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Solution

The fourth proportional to 368.38, 552.45 and 121.60 is: 182.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    368.38 : 552.45 = 121.60 : x
  2. Step 2: Convert to fraction form
    368.38/552.45 = 121.60/x
  3. Step 3: Cross multiply
    368.38x = 552.45 × 121.60
  4. Step 4: Simplify right side
    368.38x = 67,177.92
  5. Step 5: Solve for x
    x = 67,177.92/368.38
  6. Step 6: Final answer
    x = 182.36

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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.