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Finding the Fourth Proportional to 383.37, 574.24 and 318.21

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Solution

The fourth proportional to 383.37, 574.24 and 318.21 is: 476.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    383.37 : 574.24 = 318.21 : x
  2. Step 2: Convert to fraction form
    383.37/574.24 = 318.21/x
  3. Step 3: Cross multiply
    383.37x = 574.24 × 318.21
  4. Step 4: Simplify right side
    383.37x = 182,729.79
  5. Step 5: Solve for x
    x = 182,729.79/383.37
  6. Step 6: Final answer
    x = 476.65

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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.