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Finding the Fourth Proportional to 380.79, 571.23 and 149.67

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Solution

The fourth proportional to 380.79, 571.23 and 149.67 is: 224.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    380.79 : 571.23 = 149.67 : x
  2. Step 2: Convert to fraction form
    380.79/571.23 = 149.67/x
  3. Step 3: Cross multiply
    380.79x = 571.23 × 149.67
  4. Step 4: Simplify right side
    380.79x = 85,495.99
  5. Step 5: Solve for x
    x = 85,495.99/380.79
  6. Step 6: Final answer
    x = 224.52

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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.