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Finding the Fourth Proportional to 3,291.68, 4,938 and 982.88

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Solution

The fourth proportional to 3,291.68, 4,938 and 982.88 is: 1,474.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,291.68 : 4,938 = 982.88 : x
  2. Step 2: Convert to fraction form
    3,291.68/4,938 = 982.88/x
  3. Step 3: Cross multiply
    3,291.68x = 4,938 × 982.88
  4. Step 4: Simplify right side
    3,291.68x = 4,853,461.44
  5. Step 5: Solve for x
    x = 4,853,461.44/3,291.68
  6. Step 6: Final answer
    x = 1,474.46

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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.