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Finding the Fourth Proportional to 490.92, 735.43 and 393.63

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Solution

The fourth proportional to 490.92, 735.43 and 393.63 is: 589.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    490.92 : 735.43 = 393.63 : x
  2. Step 2: Convert to fraction form
    490.92/735.43 = 393.63/x
  3. Step 3: Cross multiply
    490.92x = 735.43 × 393.63
  4. Step 4: Simplify right side
    490.92x = 289,487.31
  5. Step 5: Solve for x
    x = 289,487.31/490.92
  6. Step 6: Final answer
    x = 589.68

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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.