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Finding the Fourth Proportional to 483.92, 668.49 and 385.56

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Solution

The fourth proportional to 483.92, 668.49 and 385.56 is: 532.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    483.92 : 668.49 = 385.56 : x
  2. Step 2: Convert to fraction form
    483.92/668.49 = 385.56/x
  3. Step 3: Cross multiply
    483.92x = 668.49 × 385.56
  4. Step 4: Simplify right side
    483.92x = 257,743.00
  5. Step 5: Solve for x
    x = 257,743.00/483.92
  6. Step 6: Final answer
    x = 532.61

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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.