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Finding the Fourth Proportional to 823.83, 1,235.99 and 336.92

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Solution

The fourth proportional to 823.83, 1,235.99 and 336.92 is: 505.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    823.83 : 1,235.99 = 336.92 : x
  2. Step 2: Convert to fraction form
    823.83/1,235.99 = 336.92/x
  3. Step 3: Cross multiply
    823.83x = 1,235.99 × 336.92
  4. Step 4: Simplify right side
    823.83x = 416,424.41
  5. Step 5: Solve for x
    x = 416,424.41/823.83
  6. Step 6: Final answer
    x = 505.48

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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.