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Finding the Fourth Proportional to 3,740.70, 5,619.15 and 2,647.20

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Solution

The fourth proportional to 3,740.70, 5,619.15 and 2,647.20 is: 3,976.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,740.70 : 5,619.15 = 2,647.20 : x
  2. Step 2: Convert to fraction form
    3,740.70/5,619.15 = 2,647.20/x
  3. Step 3: Cross multiply
    3,740.70x = 5,619.15 × 2,647.20
  4. Step 4: Simplify right side
    3,740.70x = 14,875,013.88
  5. Step 5: Solve for x
    x = 14,875,013.88/3,740.70
  6. Step 6: Final answer
    x = 3,976.53

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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.