Home / 2,318.80-3,198.72-1,434.28

Finding the Fourth Proportional to 2,318.80, 3,198.72 and 1,434.28

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Solution

The fourth proportional to 2,318.80, 3,198.72 and 1,434.28 is: 1,978.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,318.80 : 3,198.72 = 1,434.28 : x
  2. Step 2: Convert to fraction form
    2,318.80/3,198.72 = 1,434.28/x
  3. Step 3: Cross multiply
    2,318.80x = 3,198.72 × 1,434.28
  4. Step 4: Simplify right side
    2,318.80x = 4,587,860.12
  5. Step 5: Solve for x
    x = 4,587,860.12/2,318.80
  6. Step 6: Final answer
    x = 1,978.55

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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.