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Finding the Fourth Proportional to 491.44, 736.92 and 280.34

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Solution

The fourth proportional to 491.44, 736.92 and 280.34 is: 420.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    491.44 : 736.92 = 280.34 : x
  2. Step 2: Convert to fraction form
    491.44/736.92 = 280.34/x
  3. Step 3: Cross multiply
    491.44x = 736.92 × 280.34
  4. Step 4: Simplify right side
    491.44x = 206,588.15
  5. Step 5: Solve for x
    x = 206,588.15/491.44
  6. Step 6: Final answer
    x = 420.37

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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.