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Finding the Fourth Proportional to 351.05, 525.89 and 286.12

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Solution

The fourth proportional to 351.05, 525.89 and 286.12 is: 428.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    351.05 : 525.89 = 286.12 : x
  2. Step 2: Convert to fraction form
    351.05/525.89 = 286.12/x
  3. Step 3: Cross multiply
    351.05x = 525.89 × 286.12
  4. Step 4: Simplify right side
    351.05x = 150,467.65
  5. Step 5: Solve for x
    x = 150,467.65/351.05
  6. Step 6: Final answer
    x = 428.62

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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.