Home / 1,906.88-2,631.49-1,121.38

Finding the Fourth Proportional to 1,906.88, 2,631.49 and 1,121.38

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Solution

The fourth proportional to 1,906.88, 2,631.49 and 1,121.38 is: 1,547.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,906.88 : 2,631.49 = 1,121.38 : x
  2. Step 2: Convert to fraction form
    1,906.88/2,631.49 = 1,121.38/x
  3. Step 3: Cross multiply
    1,906.88x = 2,631.49 × 1,121.38
  4. Step 4: Simplify right side
    1,906.88x = 2,950,890.87
  5. Step 5: Solve for x
    x = 2,950,890.87/1,906.88
  6. Step 6: Final answer
    x = 1,547.50

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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.