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Finding the Fourth Proportional to 380.39, 570.61 and 149.29

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Solution

The fourth proportional to 380.39, 570.61 and 149.29 is: 223.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    380.39 : 570.61 = 149.29 : x
  2. Step 2: Convert to fraction form
    380.39/570.61 = 149.29/x
  3. Step 3: Cross multiply
    380.39x = 570.61 × 149.29
  4. Step 4: Simplify right side
    380.39x = 85,186.37
  5. Step 5: Solve for x
    x = 85,186.37/380.39
  6. Step 6: Final answer
    x = 223.95

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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.