Home / 3,131.49-4,320.66-1,804.89

Finding the Fourth Proportional to 3,131.49, 4,320.66 and 1,804.89

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Solution

The fourth proportional to 3,131.49, 4,320.66 and 1,804.89 is: 2,490.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,131.49 : 4,320.66 = 1,804.89 : x
  2. Step 2: Convert to fraction form
    3,131.49/4,320.66 = 1,804.89/x
  3. Step 3: Cross multiply
    3,131.49x = 4,320.66 × 1,804.89
  4. Step 4: Simplify right side
    3,131.49x = 7,798,316.03
  5. Step 5: Solve for x
    x = 7,798,316.03/3,131.49
  6. Step 6: Final answer
    x = 2,490.29

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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.