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Finding the Fourth Proportional to 823.91, 1,235.05 and 361.94

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Solution

The fourth proportional to 823.91, 1,235.05 and 361.94 is: 542.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    823.91 : 1,235.05 = 361.94 : x
  2. Step 2: Convert to fraction form
    823.91/1,235.05 = 361.94/x
  3. Step 3: Cross multiply
    823.91x = 1,235.05 × 361.94
  4. Step 4: Simplify right side
    823.91x = 447,006.92
  5. Step 5: Solve for x
    x = 447,006.92/823.91
  6. Step 6: Final answer
    x = 542.55

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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.