Home / 3,909.56-5,865.20-1,312.44

Finding the Fourth Proportional to 3,909.56, 5,865.20 and 1,312.44

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Solution

The fourth proportional to 3,909.56, 5,865.20 and 1,312.44 is: 1,968.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,909.56 : 5,865.20 = 1,312.44 : x
  2. Step 2: Convert to fraction form
    3,909.56/5,865.20 = 1,312.44/x
  3. Step 3: Cross multiply
    3,909.56x = 5,865.20 × 1,312.44
  4. Step 4: Simplify right side
    3,909.56x = 7,697,723.09
  5. Step 5: Solve for x
    x = 7,697,723.09/3,909.56
  6. Step 6: Final answer
    x = 1,968.95

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.