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Finding the Fourth Proportional to 2,980.08, 4,469.67 and 788.90

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Solution

The fourth proportional to 2,980.08, 4,469.67 and 788.90 is: 1,183.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,980.08 : 4,469.67 = 788.90 : x
  2. Step 2: Convert to fraction form
    2,980.08/4,469.67 = 788.90/x
  3. Step 3: Cross multiply
    2,980.08x = 4,469.67 × 788.90
  4. Step 4: Simplify right side
    2,980.08x = 3,526,100.31
  5. Step 5: Solve for x
    x = 3,526,100.31/2,980.08
  6. Step 6: Final answer
    x = 1,183.22

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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.