Home / 2,379.21-3,281.95-1,384.37

Finding the Fourth Proportional to 2,379.21, 3,281.95 and 1,384.37

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Solution

The fourth proportional to 2,379.21, 3,281.95 and 1,384.37 is: 1,909.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,379.21 : 3,281.95 = 1,384.37 : x
  2. Step 2: Convert to fraction form
    2,379.21/3,281.95 = 1,384.37/x
  3. Step 3: Cross multiply
    2,379.21x = 3,281.95 × 1,384.37
  4. Step 4: Simplify right side
    2,379.21x = 4,543,433.12
  5. Step 5: Solve for x
    x = 4,543,433.12/2,379.21
  6. Step 6: Final answer
    x = 1,909.64

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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.