Home / 3,131.40-4,319.91-1,804.62

Finding the Fourth Proportional to 3,131.40, 4,319.91 and 1,804.62

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Solution

The fourth proportional to 3,131.40, 4,319.91 and 1,804.62 is: 2,489.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,131.40 : 4,319.91 = 1,804.62 : x
  2. Step 2: Convert to fraction form
    3,131.40/4,319.91 = 1,804.62/x
  3. Step 3: Cross multiply
    3,131.40x = 4,319.91 × 1,804.62
  4. Step 4: Simplify right side
    3,131.40x = 7,795,795.98
  5. Step 5: Solve for x
    x = 7,795,795.98/3,131.40
  6. Step 6: Final answer
    x = 2,489.56

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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.