Home / 1,643.92-2,269.62-1,172.77

Finding the Fourth Proportional to 1,643.92, 2,269.62 and 1,172.77

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Solution

The fourth proportional to 1,643.92, 2,269.62 and 1,172.77 is: 1,619.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,643.92 : 2,269.62 = 1,172.77 : x
  2. Step 2: Convert to fraction form
    1,643.92/2,269.62 = 1,172.77/x
  3. Step 3: Cross multiply
    1,643.92x = 2,269.62 × 1,172.77
  4. Step 4: Simplify right side
    1,643.92x = 2,661,736.57
  5. Step 5: Solve for x
    x = 2,661,736.57/1,643.92
  6. Step 6: Final answer
    x = 1,619.14

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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.