Home / 3,968.88-5,479.20-2,973.80

Finding the Fourth Proportional to 3,968.88, 5,479.20 and 2,973.80

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Solution

The fourth proportional to 3,968.88, 5,479.20 and 2,973.80 is: 4,105.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,968.88 : 5,479.20 = 2,973.80 : x
  2. Step 2: Convert to fraction form
    3,968.88/5,479.20 = 2,973.80/x
  3. Step 3: Cross multiply
    3,968.88x = 5,479.20 × 2,973.80
  4. Step 4: Simplify right side
    3,968.88x = 16,294,044.96
  5. Step 5: Solve for x
    x = 16,294,044.96/3,968.88
  6. Step 6: Final answer
    x = 4,105.45

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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.