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Finding the Fourth Proportional to 2,093.34, 3,138.78 and 705.90

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Solution

The fourth proportional to 2,093.34, 3,138.78 and 705.90 is: 1,058.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,093.34 : 3,138.78 = 705.90 : x
  2. Step 2: Convert to fraction form
    2,093.34/3,138.78 = 705.90/x
  3. Step 3: Cross multiply
    2,093.34x = 3,138.78 × 705.90
  4. Step 4: Simplify right side
    2,093.34x = 2,215,664.80
  5. Step 5: Solve for x
    x = 2,215,664.80/2,093.34
  6. Step 6: Final answer
    x = 1,058.44

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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.