Home / 3,131.32-4,319.94-1,804.72

Finding the Fourth Proportional to 3,131.32, 4,319.94 and 1,804.72

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Solution

The fourth proportional to 3,131.32, 4,319.94 and 1,804.72 is: 2,489.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,131.32 : 4,319.94 = 1,804.72 : x
  2. Step 2: Convert to fraction form
    3,131.32/4,319.94 = 1,804.72/x
  3. Step 3: Cross multiply
    3,131.32x = 4,319.94 × 1,804.72
  4. Step 4: Simplify right side
    3,131.32x = 7,796,282.12
  5. Step 5: Solve for x
    x = 7,796,282.12/3,131.32
  6. Step 6: Final answer
    x = 2,489.77

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1.5x scale

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.