Home / 3,920.50-5,880.60-1,579.78

Finding the Fourth Proportional to 3,920.50, 5,880.60 and 1,579.78

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Solution

The fourth proportional to 3,920.50, 5,880.60 and 1,579.78 is: 2,369.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,920.50 : 5,880.60 = 1,579.78 : x
  2. Step 2: Convert to fraction form
    3,920.50/5,880.60 = 1,579.78/x
  3. Step 3: Cross multiply
    3,920.50x = 5,880.60 × 1,579.78
  4. Step 4: Simplify right side
    3,920.50x = 9,290,054.27
  5. Step 5: Solve for x
    x = 9,290,054.27/3,920.50
  6. Step 6: Final answer
    x = 2,369.61

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.