Home / 1,122.21-1,683.18-300.56

Finding the Fourth Proportional to 1,122.21, 1,683.18 and 300.56

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Solution

The fourth proportional to 1,122.21, 1,683.18 and 300.56 is: 450.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,122.21 : 1,683.18 = 300.56 : x
  2. Step 2: Convert to fraction form
    1,122.21/1,683.18 = 300.56/x
  3. Step 3: Cross multiply
    1,122.21x = 1,683.18 × 300.56
  4. Step 4: Simplify right side
    1,122.21x = 505,888.16
  5. Step 5: Solve for x
    x = 505,888.16/1,122.21
  6. Step 6: Final answer
    x = 450.80

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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.