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Finding the Fourth Proportional to 2,980.67, 4,471.04 and 789.39

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Solution

The fourth proportional to 2,980.67, 4,471.04 and 789.39 is: 1,184.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,980.67 : 4,471.04 = 789.39 : x
  2. Step 2: Convert to fraction form
    2,980.67/4,471.04 = 789.39/x
  3. Step 3: Cross multiply
    2,980.67x = 4,471.04 × 789.39
  4. Step 4: Simplify right side
    2,980.67x = 3,529,396.24
  5. Step 5: Solve for x
    x = 3,529,396.24/2,980.67
  6. Step 6: Final answer
    x = 1,184.10

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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.