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Finding the Fourth Proportional to 286.08, 428.40 and 170.58

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Solution

The fourth proportional to 286.08, 428.40 and 170.58 is: 255.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    286.08 : 428.40 = 170.58 : x
  2. Step 2: Convert to fraction form
    286.08/428.40 = 170.58/x
  3. Step 3: Cross multiply
    286.08x = 428.40 × 170.58
  4. Step 4: Simplify right side
    286.08x = 73,076.47
  5. Step 5: Solve for x
    x = 73,076.47/286.08
  6. Step 6: Final answer
    x = 255.44

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.