Home / 3,855.20-5,783.60-1,389.96

Finding the Fourth Proportional to 3,855.20, 5,783.60 and 1,389.96

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Solution

The fourth proportional to 3,855.20, 5,783.60 and 1,389.96 is: 2,085.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,855.20 : 5,783.60 = 1,389.96 : x
  2. Step 2: Convert to fraction form
    3,855.20/5,783.60 = 1,389.96/x
  3. Step 3: Cross multiply
    3,855.20x = 5,783.60 × 1,389.96
  4. Step 4: Simplify right side
    3,855.20x = 8,038,976.13
  5. Step 5: Solve for x
    x = 8,038,976.13/3,855.20
  6. Step 6: Final answer
    x = 2,085.23

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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.