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Finding the Fourth Proportional to 367.20, 553.26 and 318.60

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Solution

The fourth proportional to 367.20, 553.26 and 318.60 is: 480.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    367.20 : 553.26 = 318.60 : x
  2. Step 2: Convert to fraction form
    367.20/553.26 = 318.60/x
  3. Step 3: Cross multiply
    367.20x = 553.26 × 318.60
  4. Step 4: Simplify right side
    367.20x = 176,268.64
  5. Step 5: Solve for x
    x = 176,268.64/367.20
  6. Step 6: Final answer
    x = 480.03

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.