Home / 1,396.11-2,083.56-1,339.60

Finding the Fourth Proportional to 1,396.11, 2,083.56 and 1,339.60

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Solution

The fourth proportional to 1,396.11, 2,083.56 and 1,339.60 is: 1,999.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,396.11 : 2,083.56 = 1,339.60 : x
  2. Step 2: Convert to fraction form
    1,396.11/2,083.56 = 1,339.60/x
  3. Step 3: Cross multiply
    1,396.11x = 2,083.56 × 1,339.60
  4. Step 4: Simplify right side
    1,396.11x = 2,791,136.79
  5. Step 5: Solve for x
    x = 2,791,136.79/1,396.11
  6. Step 6: Final answer
    x = 1,999.22

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1.5x scale

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.