Home / 1,938.82-2,682.61-1,690.65

Finding the Fourth Proportional to 1,938.82, 2,682.61 and 1,690.65

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Solution

The fourth proportional to 1,938.82, 2,682.61 and 1,690.65 is: 2,339.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,938.82 : 2,682.61 = 1,690.65 : x
  2. Step 2: Convert to fraction form
    1,938.82/2,682.61 = 1,690.65/x
  3. Step 3: Cross multiply
    1,938.82x = 2,682.61 × 1,690.65
  4. Step 4: Simplify right side
    1,938.82x = 4,535,346.14
  5. Step 5: Solve for x
    x = 4,535,346.14/1,938.82
  6. Step 6: Final answer
    x = 2,339.24

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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.