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Finding the Fourth Proportional to 823.49, 1,235.39 and 336.59

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Solution

The fourth proportional to 823.49, 1,235.39 and 336.59 is: 504.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    823.49 : 1,235.39 = 336.59 : x
  2. Step 2: Convert to fraction form
    823.49/1,235.39 = 336.59/x
  3. Step 3: Cross multiply
    823.49x = 1,235.39 × 336.59
  4. Step 4: Simplify right side
    823.49x = 415,812.06
  5. Step 5: Solve for x
    x = 415,812.06/823.49
  6. Step 6: Final answer
    x = 504.94

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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.