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Finding the Fourth Proportional to 1,227.15, 1,840.16 and 361.29

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Solution

The fourth proportional to 1,227.15, 1,840.16 and 361.29 is: 541.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,227.15 : 1,840.16 = 361.29 : x
  2. Step 2: Convert to fraction form
    1,227.15/1,840.16 = 361.29/x
  3. Step 3: Cross multiply
    1,227.15x = 1,840.16 × 361.29
  4. Step 4: Simplify right side
    1,227.15x = 664,829.60
  5. Step 5: Solve for x
    x = 664,829.60/1,227.15
  6. Step 6: Final answer
    x = 541.77

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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.