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Finding the Fourth Proportional to 741.21, 1,111.79 and 254.27

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Solution

The fourth proportional to 741.21, 1,111.79 and 254.27 is: 381.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    741.21 : 1,111.79 = 254.27 : x
  2. Step 2: Convert to fraction form
    741.21/1,111.79 = 254.27/x
  3. Step 3: Cross multiply
    741.21x = 1,111.79 × 254.27
  4. Step 4: Simplify right side
    741.21x = 282,688.01
  5. Step 5: Solve for x
    x = 282,688.01/741.21
  6. Step 6: Final answer
    x = 381.39

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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.