Home / 3,405.23-4,698.84-1,912.80

Finding the Fourth Proportional to 3,405.23, 4,698.84 and 1,912.80

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Solution

The fourth proportional to 3,405.23, 4,698.84 and 1,912.80 is: 2,639.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,405.23 : 4,698.84 = 1,912.80 : x
  2. Step 2: Convert to fraction form
    3,405.23/4,698.84 = 1,912.80/x
  3. Step 3: Cross multiply
    3,405.23x = 4,698.84 × 1,912.80
  4. Step 4: Simplify right side
    3,405.23x = 8,987,941.15
  5. Step 5: Solve for x
    x = 8,987,941.15/3,405.23
  6. Step 6: Final answer
    x = 2,639.45

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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.