Home / 2,986.04-4,120.74-1,659.78

Finding the Fourth Proportional to 2,986.04, 4,120.74 and 1,659.78

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Solution

The fourth proportional to 2,986.04, 4,120.74 and 1,659.78 is: 2,290.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,986.04 : 4,120.74 = 1,659.78 : x
  2. Step 2: Convert to fraction form
    2,986.04/4,120.74 = 1,659.78/x
  3. Step 3: Cross multiply
    2,986.04x = 4,120.74 × 1,659.78
  4. Step 4: Simplify right side
    2,986.04x = 6,839,521.84
  5. Step 5: Solve for x
    x = 6,839,521.84/2,986.04
  6. Step 6: Final answer
    x = 2,290.50

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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.