Home / 1,694.75-2,338.70-948.78

Finding the Fourth Proportional to 1,694.75, 2,338.70 and 948.78

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Solution

The fourth proportional to 1,694.75, 2,338.70 and 948.78 is: 1,309.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,694.75 : 2,338.70 = 948.78 : x
  2. Step 2: Convert to fraction form
    1,694.75/2,338.70 = 948.78/x
  3. Step 3: Cross multiply
    1,694.75x = 2,338.70 × 948.78
  4. Step 4: Simplify right side
    1,694.75x = 2,218,907.04
  5. Step 5: Solve for x
    x = 2,218,907.04/1,694.75
  6. Step 6: Final answer
    x = 1,309.29

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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.