Home / 1,979.70-2,976.30-1,617.12

Finding the Fourth Proportional to 1,979.70, 2,976.30 and 1,617.12

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Solution

The fourth proportional to 1,979.70, 2,976.30 and 1,617.12 is: 2,431.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,979.70 : 2,976.30 = 1,617.12 : x
  2. Step 2: Convert to fraction form
    1,979.70/2,976.30 = 1,617.12/x
  3. Step 3: Cross multiply
    1,979.70x = 2,976.30 × 1,617.12
  4. Step 4: Simplify right side
    1,979.70x = 4,813,034.26
  5. Step 5: Solve for x
    x = 4,813,034.26/1,979.70
  6. Step 6: Final answer
    x = 2,431.19

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.