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Finding the Fourth Proportional to 746.96, 1,119.76 and 381.56

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Solution

The fourth proportional to 746.96, 1,119.76 and 381.56 is: 571.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    746.96 : 1,119.76 = 381.56 : x
  2. Step 2: Convert to fraction form
    746.96/1,119.76 = 381.56/x
  3. Step 3: Cross multiply
    746.96x = 1,119.76 × 381.56
  4. Step 4: Simplify right side
    746.96x = 427,255.63
  5. Step 5: Solve for x
    x = 427,255.63/746.96
  6. Step 6: Final answer
    x = 571.99

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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.