Home / 1,928.92-2,661.76-1,089.56

Finding the Fourth Proportional to 1,928.92, 2,661.76 and 1,089.56

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Solution

The fourth proportional to 1,928.92, 2,661.76 and 1,089.56 is: 1,503.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,928.92 : 2,661.76 = 1,089.56 : x
  2. Step 2: Convert to fraction form
    1,928.92/2,661.76 = 1,089.56/x
  3. Step 3: Cross multiply
    1,928.92x = 2,661.76 × 1,089.56
  4. Step 4: Simplify right side
    1,928.92x = 2,900,147.23
  5. Step 5: Solve for x
    x = 2,900,147.23/1,928.92
  6. Step 6: Final answer
    x = 1,503.51

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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.