Home / 3,128.91-4,318.74-1,949.28

Finding the Fourth Proportional to 3,128.91, 4,318.74 and 1,949.28

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Solution

The fourth proportional to 3,128.91, 4,318.74 and 1,949.28 is: 2,690.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,128.91 : 4,318.74 = 1,949.28 : x
  2. Step 2: Convert to fraction form
    3,128.91/4,318.74 = 1,949.28/x
  3. Step 3: Cross multiply
    3,128.91x = 4,318.74 × 1,949.28
  4. Step 4: Simplify right side
    3,128.91x = 8,418,433.51
  5. Step 5: Solve for x
    x = 8,418,433.51/3,128.91
  6. Step 6: Final answer
    x = 2,690.53

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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.