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Finding the Fourth Proportional to 383.52, 575.28 and 380.64

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Solution

The fourth proportional to 383.52, 575.28 and 380.64 is: 570.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    383.52 : 575.28 = 380.64 : x
  2. Step 2: Convert to fraction form
    383.52/575.28 = 380.64/x
  3. Step 3: Cross multiply
    383.52x = 575.28 × 380.64
  4. Step 4: Simplify right side
    383.52x = 218,974.58
  5. Step 5: Solve for x
    x = 218,974.58/383.52
  6. Step 6: Final answer
    x = 570.96

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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.