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Finding the Fourth Proportional to 380.84, 571.30 and 149.84

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Solution

The fourth proportional to 380.84, 571.30 and 149.84 is: 224.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    380.84 : 571.30 = 149.84 : x
  2. Step 2: Convert to fraction form
    380.84/571.30 = 149.84/x
  3. Step 3: Cross multiply
    380.84x = 571.30 × 149.84
  4. Step 4: Simplify right side
    380.84x = 85,603.59
  5. Step 5: Solve for x
    x = 85,603.59/380.84
  6. Step 6: Final answer
    x = 224.78

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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.