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Finding the Fourth Proportional to 3,879.09, 5,819.55 and 1,688.45

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Solution

The fourth proportional to 3,879.09, 5,819.55 and 1,688.45 is: 2,533.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,879.09 : 5,819.55 = 1,688.45 : x
  2. Step 2: Convert to fraction form
    3,879.09/5,819.55 = 1,688.45/x
  3. Step 3: Cross multiply
    3,879.09x = 5,819.55 × 1,688.45
  4. Step 4: Simplify right side
    3,879.09x = 9,825,990.10
  5. Step 5: Solve for x
    x = 9,825,990.10/3,879.09
  6. Step 6: Final answer
    x = 2,533.07

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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.