Home / 1,683.21-2,523.60-860.79

Finding the Fourth Proportional to 1,683.21, 2,523.60 and 860.79

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Solution

The fourth proportional to 1,683.21, 2,523.60 and 860.79 is: 1,290.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,683.21 : 2,523.60 = 860.79 : x
  2. Step 2: Convert to fraction form
    1,683.21/2,523.60 = 860.79/x
  3. Step 3: Cross multiply
    1,683.21x = 2,523.60 × 860.79
  4. Step 4: Simplify right side
    1,683.21x = 2,172,289.64
  5. Step 5: Solve for x
    x = 2,172,289.64/1,683.21
  6. Step 6: Final answer
    x = 1,290.56

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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.