Home / 1,238.40-1,843.45-1,219.94

Finding the Fourth Proportional to 1,238.40, 1,843.45 and 1,219.94

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Solution

The fourth proportional to 1,238.40, 1,843.45 and 1,219.94 is: 1,815.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,238.40 : 1,843.45 = 1,219.94 : x
  2. Step 2: Convert to fraction form
    1,238.40/1,843.45 = 1,219.94/x
  3. Step 3: Cross multiply
    1,238.40x = 1,843.45 × 1,219.94
  4. Step 4: Simplify right side
    1,238.40x = 2,248,898.39
  5. Step 5: Solve for x
    x = 2,248,898.39/1,238.40
  6. Step 6: Final answer
    x = 1,815.97

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.