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Finding the Fourth Proportional to 382.22, 528.06 and 319.94

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Solution

The fourth proportional to 382.22, 528.06 and 319.94 is: 442.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    382.22 : 528.06 = 319.94 : x
  2. Step 2: Convert to fraction form
    382.22/528.06 = 319.94/x
  3. Step 3: Cross multiply
    382.22x = 528.06 × 319.94
  4. Step 4: Simplify right side
    382.22x = 168,947.52
  5. Step 5: Solve for x
    x = 168,947.52/382.22
  6. Step 6: Final answer
    x = 442.02

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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.