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Finding the Fourth Proportional to 5,706, 7,874.20 and 3,188.35

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Solution

The fourth proportional to 5,706, 7,874.20 and 3,188.35 is: 4,399.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,706 : 7,874.20 = 3,188.35 : x
  2. Step 2: Convert to fraction form
    5,706/7,874.20 = 3,188.35/x
  3. Step 3: Cross multiply
    5,706x = 7,874.20 × 3,188.35
  4. Step 4: Simplify right side
    5,706x = 25,105,705.57
  5. Step 5: Solve for x
    x = 25,105,705.57/5,706
  6. Step 6: Final answer
    x = 4,399.88

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.