Home / 1,421.24-2,123.62-1,112.36

Finding the Fourth Proportional to 1,421.24, 2,123.62 and 1,112.36

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Solution

The fourth proportional to 1,421.24, 2,123.62 and 1,112.36 is: 1,662.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,421.24 : 2,123.62 = 1,112.36 : x
  2. Step 2: Convert to fraction form
    1,421.24/2,123.62 = 1,112.36/x
  3. Step 3: Cross multiply
    1,421.24x = 2,123.62 × 1,112.36
  4. Step 4: Simplify right side
    1,421.24x = 2,362,229.94
  5. Step 5: Solve for x
    x = 2,362,229.94/1,421.24
  6. Step 6: Final answer
    x = 1,662.09

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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.