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Finding the Fourth Proportional to 746.89, 1,119.88 and 381.94

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Solution

The fourth proportional to 746.89, 1,119.88 and 381.94 is: 572.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    746.89 : 1,119.88 = 381.94 : x
  2. Step 2: Convert to fraction form
    746.89/1,119.88 = 381.94/x
  3. Step 3: Cross multiply
    746.89x = 1,119.88 × 381.94
  4. Step 4: Simplify right side
    746.89x = 427,726.97
  5. Step 5: Solve for x
    x = 427,726.97/746.89
  6. Step 6: Final answer
    x = 572.68

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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.