Home / 3,131.04-4,321.06-1,805.08

Finding the Fourth Proportional to 3,131.04, 4,321.06 and 1,805.08

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Solution

The fourth proportional to 3,131.04, 4,321.06 and 1,805.08 is: 2,491.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,131.04 : 4,321.06 = 1,805.08 : x
  2. Step 2: Convert to fraction form
    3,131.04/4,321.06 = 1,805.08/x
  3. Step 3: Cross multiply
    3,131.04x = 4,321.06 × 1,805.08
  4. Step 4: Simplify right side
    3,131.04x = 7,799,858.98
  5. Step 5: Solve for x
    x = 7,799,858.98/3,131.04
  6. Step 6: Final answer
    x = 2,491.14

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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.