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Finding the Fourth Proportional to 3,970.94, 5,479.04 and 2,479.19

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Solution

The fourth proportional to 3,970.94, 5,479.04 and 2,479.19 is: 3,420.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,970.94 : 5,479.04 = 2,479.19 : x
  2. Step 2: Convert to fraction form
    3,970.94/5,479.04 = 2,479.19/x
  3. Step 3: Cross multiply
    3,970.94x = 5,479.04 × 2,479.19
  4. Step 4: Simplify right side
    3,970.94x = 13,583,559.98
  5. Step 5: Solve for x
    x = 13,583,559.98/3,970.94
  6. Step 6: Final answer
    x = 3,420.75

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1.5x scale

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.