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Finding the Fourth Proportional to 376.80, 564.48 and 255.12

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Solution

The fourth proportional to 376.80, 564.48 and 255.12 is: 382.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    376.80 : 564.48 = 255.12 : x
  2. Step 2: Convert to fraction form
    376.80/564.48 = 255.12/x
  3. Step 3: Cross multiply
    376.80x = 564.48 × 255.12
  4. Step 4: Simplify right side
    376.80x = 144,010.14
  5. Step 5: Solve for x
    x = 144,010.14/376.80
  6. Step 6: Final answer
    x = 382.19

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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.