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Finding the Fourth Proportional to 3,081.30, 4,622.76 and 889.98

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Solution

The fourth proportional to 3,081.30, 4,622.76 and 889.98 is: 1,335.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,081.30 : 4,622.76 = 889.98 : x
  2. Step 2: Convert to fraction form
    3,081.30/4,622.76 = 889.98/x
  3. Step 3: Cross multiply
    3,081.30x = 4,622.76 × 889.98
  4. Step 4: Simplify right side
    3,081.30x = 4,114,163.94
  5. Step 5: Solve for x
    x = 4,114,163.94/3,081.30
  6. Step 6: Final answer
    x = 1,335.20

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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.