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Finding the Fourth Proportional to 705.53, 1,058.42 and 218.49

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Solution

The fourth proportional to 705.53, 1,058.42 and 218.49 is: 327.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    705.53 : 1,058.42 = 218.49 : x
  2. Step 2: Convert to fraction form
    705.53/1,058.42 = 218.49/x
  3. Step 3: Cross multiply
    705.53x = 1,058.42 × 218.49
  4. Step 4: Simplify right side
    705.53x = 231,247.80
  5. Step 5: Solve for x
    x = 231,247.80/705.53
  6. Step 6: Final answer
    x = 327.76

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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.