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Finding the Fourth Proportional to 287.51, 395.90 and 194.22

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Solution

The fourth proportional to 287.51, 395.90 and 194.22 is: 267.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    287.51 : 395.90 = 194.22 : x
  2. Step 2: Convert to fraction form
    287.51/395.90 = 194.22/x
  3. Step 3: Cross multiply
    287.51x = 395.90 × 194.22
  4. Step 4: Simplify right side
    287.51x = 76,891.70
  5. Step 5: Solve for x
    x = 76,891.70/287.51
  6. Step 6: Final answer
    x = 267.44

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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.