Home / 2,890.85-3,989.39-1,631.96

Finding the Fourth Proportional to 2,890.85, 3,989.39 and 1,631.96

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Solution

The fourth proportional to 2,890.85, 3,989.39 and 1,631.96 is: 2,252.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,890.85 : 3,989.39 = 1,631.96 : x
  2. Step 2: Convert to fraction form
    2,890.85/3,989.39 = 1,631.96/x
  3. Step 3: Cross multiply
    2,890.85x = 3,989.39 × 1,631.96
  4. Step 4: Simplify right side
    2,890.85x = 6,510,534.88
  5. Step 5: Solve for x
    x = 6,510,534.88/2,890.85
  6. Step 6: Final answer
    x = 2,252.12

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.