Home / 2,979.75-4,112.12-1,653.43

Finding the Fourth Proportional to 2,979.75, 4,112.12 and 1,653.43

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Solution

The fourth proportional to 2,979.75, 4,112.12 and 1,653.43 is: 2,281.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,979.75 : 4,112.12 = 1,653.43 : x
  2. Step 2: Convert to fraction form
    2,979.75/4,112.12 = 1,653.43/x
  3. Step 3: Cross multiply
    2,979.75x = 4,112.12 × 1,653.43
  4. Step 4: Simplify right side
    2,979.75x = 6,799,094.30
  5. Step 5: Solve for x
    x = 6,799,094.30/2,979.75
  6. Step 6: Final answer
    x = 2,281.77

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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.