Home / 3,128.96-4,318.89-1,934.30

Finding the Fourth Proportional to 3,128.96, 4,318.89 and 1,934.30

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Solution

The fourth proportional to 3,128.96, 4,318.89 and 1,934.30 is: 2,669.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,128.96 : 4,318.89 = 1,934.30 : x
  2. Step 2: Convert to fraction form
    3,128.96/4,318.89 = 1,934.30/x
  3. Step 3: Cross multiply
    3,128.96x = 4,318.89 × 1,934.30
  4. Step 4: Simplify right side
    3,128.96x = 8,354,007.33
  5. Step 5: Solve for x
    x = 8,354,007.33/3,128.96
  6. Step 6: Final answer
    x = 2,669.90

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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.