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Finding the Fourth Proportional to 287.13, 395.43 and 286.23

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Solution

The fourth proportional to 287.13, 395.43 and 286.23 is: 394.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    287.13 : 395.43 = 286.23 : x
  2. Step 2: Convert to fraction form
    287.13/395.43 = 286.23/x
  3. Step 3: Cross multiply
    287.13x = 395.43 × 286.23
  4. Step 4: Simplify right side
    287.13x = 113,183.93
  5. Step 5: Solve for x
    x = 113,183.93/287.13
  6. Step 6: Final answer
    x = 394.19

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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.