Home / 2,166.95-2,990.38-1,172.23

Finding the Fourth Proportional to 2,166.95, 2,990.38 and 1,172.23

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Solution

The fourth proportional to 2,166.95, 2,990.38 and 1,172.23 is: 1,617.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,166.95 : 2,990.38 = 1,172.23 : x
  2. Step 2: Convert to fraction form
    2,166.95/2,990.38 = 1,172.23/x
  3. Step 3: Cross multiply
    2,166.95x = 2,990.38 × 1,172.23
  4. Step 4: Simplify right side
    2,166.95x = 3,505,413.15
  5. Step 5: Solve for x
    x = 3,505,413.15/2,166.95
  6. Step 6: Final answer
    x = 1,617.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.