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Finding the Fourth Proportional to 485.48, 668.22 and 360.92

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Solution

The fourth proportional to 485.48, 668.22 and 360.92 is: 496.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    485.48 : 668.22 = 360.92 : x
  2. Step 2: Convert to fraction form
    485.48/668.22 = 360.92/x
  3. Step 3: Cross multiply
    485.48x = 668.22 × 360.92
  4. Step 4: Simplify right side
    485.48x = 241,173.96
  5. Step 5: Solve for x
    x = 241,173.96/485.48
  6. Step 6: Final answer
    x = 496.77

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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.