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Finding the Fourth Proportional to 825.02, 1,235.99 and 641.52

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Solution

The fourth proportional to 825.02, 1,235.99 and 641.52 is: 961.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    825.02 : 1,235.99 = 641.52 : x
  2. Step 2: Convert to fraction form
    825.02/1,235.99 = 641.52/x
  3. Step 3: Cross multiply
    825.02x = 1,235.99 × 641.52
  4. Step 4: Simplify right side
    825.02x = 792,912.30
  5. Step 5: Solve for x
    x = 792,912.30/825.02
  6. Step 6: Final answer
    x = 961.08

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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.