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Finding the Fourth Proportional to 5,390.74, 8,084.10 and 1,879.85

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Solution

The fourth proportional to 5,390.74, 8,084.10 and 1,879.85 is: 2,819.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,390.74 : 8,084.10 = 1,879.85 : x
  2. Step 2: Convert to fraction form
    5,390.74/8,084.10 = 1,879.85/x
  3. Step 3: Cross multiply
    5,390.74x = 8,084.10 × 1,879.85
  4. Step 4: Simplify right side
    5,390.74x = 15,196,845.57
  5. Step 5: Solve for x
    x = 15,196,845.57/5,390.74
  6. Step 6: Final answer
    x = 2,819.06

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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.