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Finding the Fourth Proportional to 286.01, 428.28 and 155.52

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Solution

The fourth proportional to 286.01, 428.28 and 155.52 is: 232.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    286.01 : 428.28 = 155.52 : x
  2. Step 2: Convert to fraction form
    286.01/428.28 = 155.52/x
  3. Step 3: Cross multiply
    286.01x = 428.28 × 155.52
  4. Step 4: Simplify right side
    286.01x = 66,606.11
  5. Step 5: Solve for x
    x = 66,606.11/286.01
  6. Step 6: Final answer
    x = 232.88

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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.