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Finding the Fourth Proportional to 380.22, 570.46 and 120.26

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Solution

The fourth proportional to 380.22, 570.46 and 120.26 is: 180.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    380.22 : 570.46 = 120.26 : x
  2. Step 2: Convert to fraction form
    380.22/570.46 = 120.26/x
  3. Step 3: Cross multiply
    380.22x = 570.46 × 120.26
  4. Step 4: Simplify right side
    380.22x = 68,603.52
  5. Step 5: Solve for x
    x = 68,603.52/380.22
  6. Step 6: Final answer
    x = 180.43

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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.