Home / 2,179.13-3,002.99-1,391.81

Finding the Fourth Proportional to 2,179.13, 3,002.99 and 1,391.81

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Solution

The fourth proportional to 2,179.13, 3,002.99 and 1,391.81 is: 1,918.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,179.13 : 3,002.99 = 1,391.81 : x
  2. Step 2: Convert to fraction form
    2,179.13/3,002.99 = 1,391.81/x
  3. Step 3: Cross multiply
    2,179.13x = 3,002.99 × 1,391.81
  4. Step 4: Simplify right side
    2,179.13x = 4,179,579.98
  5. Step 5: Solve for x
    x = 4,179,579.98/2,179.13
  6. Step 6: Final answer
    x = 1,918.01

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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.