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Finding the Fourth Proportional to 705.69, 1,058.84 and 381.29

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Solution

The fourth proportional to 705.69, 1,058.84 and 381.29 is: 572.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    705.69 : 1,058.84 = 381.29 : x
  2. Step 2: Convert to fraction form
    705.69/1,058.84 = 381.29/x
  3. Step 3: Cross multiply
    705.69x = 1,058.84 × 381.29
  4. Step 4: Simplify right side
    705.69x = 403,719.33
  5. Step 5: Solve for x
    x = 403,719.33/705.69
  6. Step 6: Final answer
    x = 572.09

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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.