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Finding the Fourth Proportional to 286.60, 395.21 and 245.29

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Solution

The fourth proportional to 286.60, 395.21 and 245.29 is: 338.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    286.60 : 395.21 = 245.29 : x
  2. Step 2: Convert to fraction form
    286.60/395.21 = 245.29/x
  3. Step 3: Cross multiply
    286.60x = 395.21 × 245.29
  4. Step 4: Simplify right side
    286.60x = 96,942.17
  5. Step 5: Solve for x
    x = 96,942.17/286.60
  6. Step 6: Final answer
    x = 338.25

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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.