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Finding the Fourth Proportional to 342, 472.14 and 225.76

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Solution

The fourth proportional to 342, 472.14 and 225.76 is: 311.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    342 : 472.14 = 225.76 : x
  2. Step 2: Convert to fraction form
    342/472.14 = 225.76/x
  3. Step 3: Cross multiply
    342x = 472.14 × 225.76
  4. Step 4: Simplify right side
    342x = 106,590.33
  5. Step 5: Solve for x
    x = 106,590.33/342
  6. Step 6: Final answer
    x = 311.67

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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.