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Finding the Fourth Proportional to 2,420.80, 3,338.40 and 1,896.64

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Solution

The fourth proportional to 2,420.80, 3,338.40 and 1,896.64 is: 2,615.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,420.80 : 3,338.40 = 1,896.64 : x
  2. Step 2: Convert to fraction form
    2,420.80/3,338.40 = 1,896.64/x
  3. Step 3: Cross multiply
    2,420.80x = 3,338.40 × 1,896.64
  4. Step 4: Simplify right side
    2,420.80x = 6,331,742.98
  5. Step 5: Solve for x
    x = 6,331,742.98/2,420.80
  6. Step 6: Final answer
    x = 2,615.56

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.