Home / 1,938.91-2,682.73-1,690.74

Finding the Fourth Proportional to 1,938.91, 2,682.73 and 1,690.74

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Solution

The fourth proportional to 1,938.91, 2,682.73 and 1,690.74 is: 2,339.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,938.91 : 2,682.73 = 1,690.74 : x
  2. Step 2: Convert to fraction form
    1,938.91/2,682.73 = 1,690.74/x
  3. Step 3: Cross multiply
    1,938.91x = 2,682.73 × 1,690.74
  4. Step 4: Simplify right side
    1,938.91x = 4,535,798.92
  5. Step 5: Solve for x
    x = 4,535,798.92/1,938.91
  6. Step 6: Final answer
    x = 2,339.36

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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.