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Finding the Fourth Proportional to 382.88, 528.72 and 295.76

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Solution

The fourth proportional to 382.88, 528.72 and 295.76 is: 408.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    382.88 : 528.72 = 295.76 : x
  2. Step 2: Convert to fraction form
    382.88/528.72 = 295.76/x
  3. Step 3: Cross multiply
    382.88x = 528.72 × 295.76
  4. Step 4: Simplify right side
    382.88x = 156,374.23
  5. Step 5: Solve for x
    x = 156,374.23/382.88
  6. Step 6: Final answer
    x = 408.42

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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.