Home / 1,228.08-1,840.92-1,120.08

Finding the Fourth Proportional to 1,228.08, 1,840.92 and 1,120.08

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Solution

The fourth proportional to 1,228.08, 1,840.92 and 1,120.08 is: 1,679.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,228.08 : 1,840.92 = 1,120.08 : x
  2. Step 2: Convert to fraction form
    1,228.08/1,840.92 = 1,120.08/x
  3. Step 3: Cross multiply
    1,228.08x = 1,840.92 × 1,120.08
  4. Step 4: Simplify right side
    1,228.08x = 2,061,977.67
  5. Step 5: Solve for x
    x = 2,061,977.67/1,228.08
  6. Step 6: Final answer
    x = 1,679.03

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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.