Home / 3,920.50-5,879.87-1,146.45

Finding the Fourth Proportional to 3,920.50, 5,879.87 and 1,146.45

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Solution

The fourth proportional to 3,920.50, 5,879.87 and 1,146.45 is: 1,719.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,920.50 : 5,879.87 = 1,146.45 : x
  2. Step 2: Convert to fraction form
    3,920.50/5,879.87 = 1,146.45/x
  3. Step 3: Cross multiply
    3,920.50x = 5,879.87 × 1,146.45
  4. Step 4: Simplify right side
    3,920.50x = 6,740,976.96
  5. Step 5: Solve for x
    x = 6,740,976.96/3,920.50
  6. Step 6: Final answer
    x = 1,719.42

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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.