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Finding the Fourth Proportional to 2,150.98, 3,228 and 981.13

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Solution

The fourth proportional to 2,150.98, 3,228 and 981.13 is: 1,472.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,150.98 : 3,228 = 981.13 : x
  2. Step 2: Convert to fraction form
    2,150.98/3,228 = 981.13/x
  3. Step 3: Cross multiply
    2,150.98x = 3,228 × 981.13
  4. Step 4: Simplify right side
    2,150.98x = 3,167,087.64
  5. Step 5: Solve for x
    x = 3,167,087.64/2,150.98
  6. Step 6: Final answer
    x = 1,472.39

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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.