Home / 3,081.56-4,622.46-1,985

Finding the Fourth Proportional to 3,081.56, 4,622.46 and 1,985

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Solution

The fourth proportional to 3,081.56, 4,622.46 and 1,985 is: 2,977.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,081.56 : 4,622.46 = 1,985 : x
  2. Step 2: Convert to fraction form
    3,081.56/4,622.46 = 1,985/x
  3. Step 3: Cross multiply
    3,081.56x = 4,622.46 × 1,985
  4. Step 4: Simplify right side
    3,081.56x = 9,175,583.10
  5. Step 5: Solve for x
    x = 9,175,583.10/3,081.56
  6. Step 6: Final answer
    x = 2,977.58

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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.