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Finding the Fourth Proportional to 835.34, 1,252.99 and 280.09

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Solution

The fourth proportional to 835.34, 1,252.99 and 280.09 is: 420.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    835.34 : 1,252.99 = 280.09 : x
  2. Step 2: Convert to fraction form
    835.34/1,252.99 = 280.09/x
  3. Step 3: Cross multiply
    835.34x = 1,252.99 × 280.09
  4. Step 4: Simplify right side
    835.34x = 350,949.97
  5. Step 5: Solve for x
    x = 350,949.97/835.34
  6. Step 6: Final answer
    x = 420.13

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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.