Home / 3,086.40-4,260.64-1,968.88

Finding the Fourth Proportional to 3,086.40, 4,260.64 and 1,968.88

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Solution

The fourth proportional to 3,086.40, 4,260.64 and 1,968.88 is: 2,717.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,086.40 : 4,260.64 = 1,968.88 : x
  2. Step 2: Convert to fraction form
    3,086.40/4,260.64 = 1,968.88/x
  3. Step 3: Cross multiply
    3,086.40x = 4,260.64 × 1,968.88
  4. Step 4: Simplify right side
    3,086.40x = 8,388,688.88
  5. Step 5: Solve for x
    x = 8,388,688.88/3,086.40
  6. Step 6: Final answer
    x = 2,717.95

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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.