Home / 2,986.42-4,120.79-1,660.12

Finding the Fourth Proportional to 2,986.42, 4,120.79 and 1,660.12

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Solution

The fourth proportional to 2,986.42, 4,120.79 and 1,660.12 is: 2,290.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,986.42 : 4,120.79 = 1,660.12 : x
  2. Step 2: Convert to fraction form
    2,986.42/4,120.79 = 1,660.12/x
  3. Step 3: Cross multiply
    2,986.42x = 4,120.79 × 1,660.12
  4. Step 4: Simplify right side
    2,986.42x = 6,841,005.89
  5. Step 5: Solve for x
    x = 6,841,005.89/2,986.42
  6. Step 6: Final answer
    x = 2,290.70

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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.