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Finding the Fourth Proportional to 1,879.75, 2,819.67 and 725.50

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Solution

The fourth proportional to 1,879.75, 2,819.67 and 725.50 is: 1,088.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,879.75 : 2,819.67 = 725.50 : x
  2. Step 2: Convert to fraction form
    1,879.75/2,819.67 = 725.50/x
  3. Step 3: Cross multiply
    1,879.75x = 2,819.67 × 725.50
  4. Step 4: Simplify right side
    1,879.75x = 2,045,670.59
  5. Step 5: Solve for x
    x = 2,045,670.59/1,879.75
  6. Step 6: Final answer
    x = 1,088.27

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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.