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Finding the Fourth Proportional to 1,964.55, 2,711.22 and 1,218.96

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Solution

The fourth proportional to 1,964.55, 2,711.22 and 1,218.96 is: 1,682.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,964.55 : 2,711.22 = 1,218.96 : x
  2. Step 2: Convert to fraction form
    1,964.55/2,711.22 = 1,218.96/x
  3. Step 3: Cross multiply
    1,964.55x = 2,711.22 × 1,218.96
  4. Step 4: Simplify right side
    1,964.55x = 3,304,868.73
  5. Step 5: Solve for x
    x = 3,304,868.73/1,964.55
  6. Step 6: Final answer
    x = 1,682.25

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Why These Related Problems?

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