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Finding the Fourth Proportional to 823.27, 1,235.10 and 361.15

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Solution

The fourth proportional to 823.27, 1,235.10 and 361.15 is: 541.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    823.27 : 1,235.10 = 361.15 : x
  2. Step 2: Convert to fraction form
    823.27/1,235.10 = 361.15/x
  3. Step 3: Cross multiply
    823.27x = 1,235.10 × 361.15
  4. Step 4: Simplify right side
    823.27x = 446,056.37
  5. Step 5: Solve for x
    x = 446,056.37/823.27
  6. Step 6: Final answer
    x = 541.81

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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.