Home / 2,788.25-4,182.65-939.83

Finding the Fourth Proportional to 2,788.25, 4,182.65 and 939.83

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Solution

The fourth proportional to 2,788.25, 4,182.65 and 939.83 is: 1,409.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,788.25 : 4,182.65 = 939.83 : x
  2. Step 2: Convert to fraction form
    2,788.25/4,182.65 = 939.83/x
  3. Step 3: Cross multiply
    2,788.25x = 4,182.65 × 939.83
  4. Step 4: Simplify right side
    2,788.25x = 3,930,975.25
  5. Step 5: Solve for x
    x = 3,930,975.25/2,788.25
  6. Step 6: Final answer
    x = 1,409.84

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.