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Finding the Fourth Proportional to 731, 1,096.79 and 268.81

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Solution

The fourth proportional to 731, 1,096.79 and 268.81 is: 403.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    731 : 1,096.79 = 268.81 : x
  2. Step 2: Convert to fraction form
    731/1,096.79 = 268.81/x
  3. Step 3: Cross multiply
    731x = 1,096.79 × 268.81
  4. Step 4: Simplify right side
    731x = 294,828.12
  5. Step 5: Solve for x
    x = 294,828.12/731
  6. Step 6: Final answer
    x = 403.32

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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.