Home / 1,555.97-2,147.26-926.81

Finding the Fourth Proportional to 1,555.97, 2,147.26 and 926.81

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Solution

The fourth proportional to 1,555.97, 2,147.26 and 926.81 is: 1,279.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,555.97 : 2,147.26 = 926.81 : x
  2. Step 2: Convert to fraction form
    1,555.97/2,147.26 = 926.81/x
  3. Step 3: Cross multiply
    1,555.97x = 2,147.26 × 926.81
  4. Step 4: Simplify right side
    1,555.97x = 1,990,105.09
  5. Step 5: Solve for x
    x = 1,990,105.09/1,555.97
  6. Step 6: Final answer
    x = 1,279.01

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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.