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Finding the Fourth Proportional to 380.28, 569.16 and 235.20

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Solution

The fourth proportional to 380.28, 569.16 and 235.20 is: 352.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    380.28 : 569.16 = 235.20 : x
  2. Step 2: Convert to fraction form
    380.28/569.16 = 235.20/x
  3. Step 3: Cross multiply
    380.28x = 569.16 × 235.20
  4. Step 4: Simplify right side
    380.28x = 133,866.43
  5. Step 5: Solve for x
    x = 133,866.43/380.28
  6. Step 6: Final answer
    x = 352.02

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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.