Home / 2,421.81-3,629.84-1,120.50

Finding the Fourth Proportional to 2,421.81, 3,629.84 and 1,120.50

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Solution

The fourth proportional to 2,421.81, 3,629.84 and 1,120.50 is: 1,679.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,421.81 : 3,629.84 = 1,120.50 : x
  2. Step 2: Convert to fraction form
    2,421.81/3,629.84 = 1,120.50/x
  3. Step 3: Cross multiply
    2,421.81x = 3,629.84 × 1,120.50
  4. Step 4: Simplify right side
    2,421.81x = 4,067,230.12
  5. Step 5: Solve for x
    x = 4,067,230.12/2,421.81
  6. Step 6: Final answer
    x = 1,679.42

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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.