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Finding the Fourth Proportional to 705.57, 1,058.42 and 192.57

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Solution

The fourth proportional to 705.57, 1,058.42 and 192.57 is: 288.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    705.57 : 1,058.42 = 192.57 : x
  2. Step 2: Convert to fraction form
    705.57/1,058.42 = 192.57/x
  3. Step 3: Cross multiply
    705.57x = 1,058.42 × 192.57
  4. Step 4: Simplify right side
    705.57x = 203,813.68
  5. Step 5: Solve for x
    x = 203,813.68/705.57
  6. Step 6: Final answer
    x = 288.87

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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.