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Finding the Fourth Proportional to 1,227.12, 1,840.70 and 361.48

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Solution

The fourth proportional to 1,227.12, 1,840.70 and 361.48 is: 542.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,227.12 : 1,840.70 = 361.48 : x
  2. Step 2: Convert to fraction form
    1,227.12/1,840.70 = 361.48/x
  3. Step 3: Cross multiply
    1,227.12x = 1,840.70 × 361.48
  4. Step 4: Simplify right side
    1,227.12x = 665,376.24
  5. Step 5: Solve for x
    x = 665,376.24/1,227.12
  6. Step 6: Final answer
    x = 542.23

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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.