Home / 3,853.90-5,783.93-1,390.45

Finding the Fourth Proportional to 3,853.90, 5,783.93 and 1,390.45

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Solution

The fourth proportional to 3,853.90, 5,783.93 and 1,390.45 is: 2,086.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,853.90 : 5,783.93 = 1,390.45 : x
  2. Step 2: Convert to fraction form
    3,853.90/5,783.93 = 1,390.45/x
  3. Step 3: Cross multiply
    3,853.90x = 5,783.93 × 1,390.45
  4. Step 4: Simplify right side
    3,853.90x = 8,042,288.43
  5. Step 5: Solve for x
    x = 8,042,288.43/3,853.90
  6. Step 6: Final answer
    x = 2,086.79

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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.