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Finding the Fourth Proportional to 329.63, 494.54 and 207.74

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Solution

The fourth proportional to 329.63, 494.54 and 207.74 is: 311.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    329.63 : 494.54 = 207.74 : x
  2. Step 2: Convert to fraction form
    329.63/494.54 = 207.74/x
  3. Step 3: Cross multiply
    329.63x = 494.54 × 207.74
  4. Step 4: Simplify right side
    329.63x = 102,733.79
  5. Step 5: Solve for x
    x = 102,733.79/329.63
  6. Step 6: Final answer
    x = 311.67

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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.