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Finding the Fourth Proportional to 2,930.67, 4,396.01 and 982.80

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Solution

The fourth proportional to 2,930.67, 4,396.01 and 982.80 is: 1,474.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,930.67 : 4,396.01 = 982.80 : x
  2. Step 2: Convert to fraction form
    2,930.67/4,396.01 = 982.80/x
  3. Step 3: Cross multiply
    2,930.67x = 4,396.01 × 982.80
  4. Step 4: Simplify right side
    2,930.67x = 4,320,393.71
  5. Step 5: Solve for x
    x = 4,320,393.71/2,930.67
  6. Step 6: Final answer
    x = 1,474.20

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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.