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Finding the Fourth Proportional to 491.46, 736.94 and 217.64

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Solution

The fourth proportional to 491.46, 736.94 and 217.64 is: 326.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    491.46 : 736.94 = 217.64 : x
  2. Step 2: Convert to fraction form
    491.46/736.94 = 217.64/x
  3. Step 3: Cross multiply
    491.46x = 736.94 × 217.64
  4. Step 4: Simplify right side
    491.46x = 160,384.48
  5. Step 5: Solve for x
    x = 160,384.48/491.46
  6. Step 6: Final answer
    x = 326.34

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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.