Home / 2,939.80-4,409.70-1,845.40

Finding the Fourth Proportional to 2,939.80, 4,409.70 and 1,845.40

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Solution

The fourth proportional to 2,939.80, 4,409.70 and 1,845.40 is: 2,768.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,939.80 : 4,409.70 = 1,845.40 : x
  2. Step 2: Convert to fraction form
    2,939.80/4,409.70 = 1,845.40/x
  3. Step 3: Cross multiply
    2,939.80x = 4,409.70 × 1,845.40
  4. Step 4: Simplify right side
    2,939.80x = 8,137,660.38
  5. Step 5: Solve for x
    x = 8,137,660.38/2,939.80
  6. Step 6: Final answer
    x = 2,768.10

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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.