Home / 3,878.88-5,350.32-2,306.40

Finding the Fourth Proportional to 3,878.88, 5,350.32 and 2,306.40

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Solution

The fourth proportional to 3,878.88, 5,350.32 and 2,306.40 is: 3,181.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,878.88 : 5,350.32 = 2,306.40 : x
  2. Step 2: Convert to fraction form
    3,878.88/5,350.32 = 2,306.40/x
  3. Step 3: Cross multiply
    3,878.88x = 5,350.32 × 2,306.40
  4. Step 4: Simplify right side
    3,878.88x = 12,339,978.05
  5. Step 5: Solve for x
    x = 12,339,978.05/3,878.88
  6. Step 6: Final answer
    x = 3,181.33

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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.