Home / 1,928.75-2,661.96-1,089.63

Finding the Fourth Proportional to 1,928.75, 2,661.96 and 1,089.63

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Solution

The fourth proportional to 1,928.75, 2,661.96 and 1,089.63 is: 1,503.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,928.75 : 2,661.96 = 1,089.63 : x
  2. Step 2: Convert to fraction form
    1,928.75/2,661.96 = 1,089.63/x
  3. Step 3: Cross multiply
    1,928.75x = 2,661.96 × 1,089.63
  4. Step 4: Simplify right side
    1,928.75x = 2,900,551.47
  5. Step 5: Solve for x
    x = 2,900,551.47/1,928.75
  6. Step 6: Final answer
    x = 1,503.85

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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.