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Finding the Fourth Proportional to 352.59, 485.46 and 320.19

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Solution

The fourth proportional to 352.59, 485.46 and 320.19 is: 440.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    352.59 : 485.46 = 320.19 : x
  2. Step 2: Convert to fraction form
    352.59/485.46 = 320.19/x
  3. Step 3: Cross multiply
    352.59x = 485.46 × 320.19
  4. Step 4: Simplify right side
    352.59x = 155,439.44
  5. Step 5: Solve for x
    x = 155,439.44/352.59
  6. Step 6: Final answer
    x = 440.85

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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.