Home / 2,986.89-4,121.78-1,660.70

Finding the Fourth Proportional to 2,986.89, 4,121.78 and 1,660.70

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Solution

The fourth proportional to 2,986.89, 4,121.78 and 1,660.70 is: 2,291.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,986.89 : 4,121.78 = 1,660.70 : x
  2. Step 2: Convert to fraction form
    2,986.89/4,121.78 = 1,660.70/x
  3. Step 3: Cross multiply
    2,986.89x = 4,121.78 × 1,660.70
  4. Step 4: Simplify right side
    2,986.89x = 6,845,011.13
  5. Step 5: Solve for x
    x = 6,845,011.13/2,986.89
  6. Step 6: Final answer
    x = 2,291.69

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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.