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Finding the Fourth Proportional to 3,081.15, 4,622.54 and 890.06

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Solution

The fourth proportional to 3,081.15, 4,622.54 and 890.06 is: 1,335.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,081.15 : 4,622.54 = 890.06 : x
  2. Step 2: Convert to fraction form
    3,081.15/4,622.54 = 890.06/x
  3. Step 3: Cross multiply
    3,081.15x = 4,622.54 × 890.06
  4. Step 4: Simplify right side
    3,081.15x = 4,114,310.39
  5. Step 5: Solve for x
    x = 4,114,310.39/3,081.15
  6. Step 6: Final answer
    x = 1,335.32

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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.