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Finding the Fourth Proportional to 382.11, 526.82 and 287.19

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Solution

The fourth proportional to 382.11, 526.82 and 287.19 is: 395.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    382.11 : 526.82 = 287.19 : x
  2. Step 2: Convert to fraction form
    382.11/526.82 = 287.19/x
  3. Step 3: Cross multiply
    382.11x = 526.82 × 287.19
  4. Step 4: Simplify right side
    382.11x = 151,296.00
  5. Step 5: Solve for x
    x = 151,296.00/382.11
  6. Step 6: Final answer
    x = 395.95

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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.