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Finding the Fourth Proportional to 371.39, 556.75 and 127.86

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Solution

The fourth proportional to 371.39, 556.75 and 127.86 is: 191.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    371.39 : 556.75 = 127.86 : x
  2. Step 2: Convert to fraction form
    371.39/556.75 = 127.86/x
  3. Step 3: Cross multiply
    371.39x = 556.75 × 127.86
  4. Step 4: Simplify right side
    371.39x = 71,185.42
  5. Step 5: Solve for x
    x = 71,185.42/371.39
  6. Step 6: Final answer
    x = 191.67

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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.