Home / 2,178.04-3,004.44-1,391.20

Finding the Fourth Proportional to 2,178.04, 3,004.44 and 1,391.20

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Solution

The fourth proportional to 2,178.04, 3,004.44 and 1,391.20 is: 1,919.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,178.04 : 3,004.44 = 1,391.20 : x
  2. Step 2: Convert to fraction form
    2,178.04/3,004.44 = 1,391.20/x
  3. Step 3: Cross multiply
    2,178.04x = 3,004.44 × 1,391.20
  4. Step 4: Simplify right side
    2,178.04x = 4,179,776.93
  5. Step 5: Solve for x
    x = 4,179,776.93/2,178.04
  6. Step 6: Final answer
    x = 1,919.05

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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.