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Finding the Fourth Proportional to 322.08, 443.46 and 285.60

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Solution

The fourth proportional to 322.08, 443.46 and 285.60 is: 393.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    322.08 : 443.46 = 285.60 : x
  2. Step 2: Convert to fraction form
    322.08/443.46 = 285.60/x
  3. Step 3: Cross multiply
    322.08x = 443.46 × 285.60
  4. Step 4: Simplify right side
    322.08x = 126,652.18
  5. Step 5: Solve for x
    x = 126,652.18/322.08
  6. Step 6: Final answer
    x = 393.23

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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.