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Finding the Fourth Proportional to 441.42, 660.18 and 393.02

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Solution

The fourth proportional to 441.42, 660.18 and 393.02 is: 587.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    441.42 : 660.18 = 393.02 : x
  2. Step 2: Convert to fraction form
    441.42/660.18 = 393.02/x
  3. Step 3: Cross multiply
    441.42x = 660.18 × 393.02
  4. Step 4: Simplify right side
    441.42x = 259,460.64
  5. Step 5: Solve for x
    x = 259,460.64/441.42
  6. Step 6: Final answer
    x = 587.79

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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.