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Finding the Fourth Proportional to 5,918.68, 8,879.84 and 3,319.80

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Solution

The fourth proportional to 5,918.68, 8,879.84 and 3,319.80 is: 4,980.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,918.68 : 8,879.84 = 3,319.80 : x
  2. Step 2: Convert to fraction form
    5,918.68/8,879.84 = 3,319.80/x
  3. Step 3: Cross multiply
    5,918.68x = 8,879.84 × 3,319.80
  4. Step 4: Simplify right side
    5,918.68x = 29,479,292.83
  5. Step 5: Solve for x
    x = 29,479,292.83/5,918.68
  6. Step 6: Final answer
    x = 4,980.72

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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.