Home / 3,890.54-5,369.30-2,378.00

Finding the Fourth Proportional to 3,890.54, 5,369.30 and 2,378.00

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Solution

The fourth proportional to 3,890.54, 5,369.30 and 2,378.00 is: 3,281.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,890.54 : 5,369.30 = 2,378.00 : x
  2. Step 2: Convert to fraction form
    3,890.54/5,369.30 = 2,378.00/x
  3. Step 3: Cross multiply
    3,890.54x = 5,369.30 × 2,378.00
  4. Step 4: Simplify right side
    3,890.54x = 12,768,205.85
  5. Step 5: Solve for x
    x = 12,768,205.85/3,890.54
  6. Step 6: Final answer
    x = 3,281.86

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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.