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Finding the Fourth Proportional to 286.36, 428.50 and 177.88

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Solution

The fourth proportional to 286.36, 428.50 and 177.88 is: 266.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    286.36 : 428.50 = 177.88 : x
  2. Step 2: Convert to fraction form
    286.36/428.50 = 177.88/x
  3. Step 3: Cross multiply
    286.36x = 428.50 × 177.88
  4. Step 4: Simplify right side
    286.36x = 76,221.58
  5. Step 5: Solve for x
    x = 76,221.58/286.36
  6. Step 6: Final answer
    x = 266.17

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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.