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Finding the Fourth Proportional to 705.89, 1,059.29 and 381.48

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Solution

The fourth proportional to 705.89, 1,059.29 and 381.48 is: 572.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    705.89 : 1,059.29 = 381.48 : x
  2. Step 2: Convert to fraction form
    705.89/1,059.29 = 381.48/x
  3. Step 3: Cross multiply
    705.89x = 1,059.29 × 381.48
  4. Step 4: Simplify right side
    705.89x = 404,096.04
  5. Step 5: Solve for x
    x = 404,096.04/705.89
  6. Step 6: Final answer
    x = 572.47

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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.