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Finding the Fourth Proportional to 371.19, 512.19 and 223.86

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Solution

The fourth proportional to 371.19, 512.19 and 223.86 is: 308.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    371.19 : 512.19 = 223.86 : x
  2. Step 2: Convert to fraction form
    371.19/512.19 = 223.86/x
  3. Step 3: Cross multiply
    371.19x = 512.19 × 223.86
  4. Step 4: Simplify right side
    371.19x = 114,658.85
  5. Step 5: Solve for x
    x = 114,658.85/371.19
  6. Step 6: Final answer
    x = 308.90

Related Problems

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.