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Finding the Fourth Proportional to 380.03, 570.11 and 136.73

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Solution

The fourth proportional to 380.03, 570.11 and 136.73 is: 205.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    380.03 : 570.11 = 136.73 : x
  2. Step 2: Convert to fraction form
    380.03/570.11 = 136.73/x
  3. Step 3: Cross multiply
    380.03x = 570.11 × 136.73
  4. Step 4: Simplify right side
    380.03x = 77,947.61
  5. Step 5: Solve for x
    x = 77,947.61/380.03
  6. Step 6: Final answer
    x = 205.11

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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.