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Finding the Fourth Proportional to 380.25, 570.38 and 187.88

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Solution

The fourth proportional to 380.25, 570.38 and 187.88 is: 281.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    380.25 : 570.38 = 187.88 : x
  2. Step 2: Convert to fraction form
    380.25/570.38 = 187.88/x
  3. Step 3: Cross multiply
    380.25x = 570.38 × 187.88
  4. Step 4: Simplify right side
    380.25x = 107,159.20
  5. Step 5: Solve for x
    x = 107,159.20/380.25
  6. Step 6: Final answer
    x = 281.81

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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.