Home / 1,928.21-2,661.00-1,131.58

Finding the Fourth Proportional to 1,928.21, 2,661.00 and 1,131.58

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Solution

The fourth proportional to 1,928.21, 2,661.00 and 1,131.58 is: 1,561.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,928.21 : 2,661.00 = 1,131.58 : x
  2. Step 2: Convert to fraction form
    1,928.21/2,661.00 = 1,131.58/x
  3. Step 3: Cross multiply
    1,928.21x = 2,661.00 × 1,131.58
  4. Step 4: Simplify right side
    1,928.21x = 3,011,143.57
  5. Step 5: Solve for x
    x = 3,011,143.57/1,928.21
  6. Step 6: Final answer
    x = 1,561.63

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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.