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Finding the Fourth Proportional to 3,889.72, 5,821.80 and 2,960.26

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Solution

The fourth proportional to 3,889.72, 5,821.80 and 2,960.26 is: 4,430.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,889.72 : 5,821.80 = 2,960.26 : x
  2. Step 2: Convert to fraction form
    3,889.72/5,821.80 = 2,960.26/x
  3. Step 3: Cross multiply
    3,889.72x = 5,821.80 × 2,960.26
  4. Step 4: Simplify right side
    3,889.72x = 17,234,041.67
  5. Step 5: Solve for x
    x = 17,234,041.67/3,889.72
  6. Step 6: Final answer
    x = 4,430.66

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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.