Home / 2,979.73-4,113.21-1,984.69

Finding the Fourth Proportional to 2,979.73, 4,113.21 and 1,984.69

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Solution

The fourth proportional to 2,979.73, 4,113.21 and 1,984.69 is: 2,739.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,979.73 : 4,113.21 = 1,984.69 : x
  2. Step 2: Convert to fraction form
    2,979.73/4,113.21 = 1,984.69/x
  3. Step 3: Cross multiply
    2,979.73x = 4,113.21 × 1,984.69
  4. Step 4: Simplify right side
    2,979.73x = 8,163,446.75
  5. Step 5: Solve for x
    x = 8,163,446.75/2,979.73
  6. Step 6: Final answer
    x = 2,739.66

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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.