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Finding the Fourth Proportional to 1,836.96, 2,750.80 and 1,218.79

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Solution

The fourth proportional to 1,836.96, 2,750.80 and 1,218.79 is: 1,825.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,836.96 : 2,750.80 = 1,218.79 : x
  2. Step 2: Convert to fraction form
    1,836.96/2,750.80 = 1,218.79/x
  3. Step 3: Cross multiply
    1,836.96x = 2,750.80 × 1,218.79
  4. Step 4: Simplify right side
    1,836.96x = 3,352,647.53
  5. Step 5: Solve for x
    x = 3,352,647.53/1,836.96
  6. Step 6: Final answer
    x = 1,825.11

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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.