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Finding the Fourth Proportional to 286.16, 394.74 and 219.94

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Solution

The fourth proportional to 286.16, 394.74 and 219.94 is: 303.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    286.16 : 394.74 = 219.94 : x
  2. Step 2: Convert to fraction form
    286.16/394.74 = 219.94/x
  3. Step 3: Cross multiply
    286.16x = 394.74 × 219.94
  4. Step 4: Simplify right side
    286.16x = 86,818.13
  5. Step 5: Solve for x
    x = 86,818.13/286.16
  6. Step 6: Final answer
    x = 303.40

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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.