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Finding the Fourth Proportional to 2,879.90, 4,319.34 and 800.05

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Solution

The fourth proportional to 2,879.90, 4,319.34 and 800.05 is: 1,199.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,879.90 : 4,319.34 = 800.05 : x
  2. Step 2: Convert to fraction form
    2,879.90/4,319.34 = 800.05/x
  3. Step 3: Cross multiply
    2,879.90x = 4,319.34 × 800.05
  4. Step 4: Simplify right side
    2,879.90x = 3,455,687.97
  5. Step 5: Solve for x
    x = 3,455,687.97/2,879.90
  6. Step 6: Final answer
    x = 1,199.93

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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.