Home / 1,290.20-1,934.55-1,136.43

Finding the Fourth Proportional to 1,290.20, 1,934.55 and 1,136.43

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Solution

The fourth proportional to 1,290.20, 1,934.55 and 1,136.43 is: 1,703.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,290.20 : 1,934.55 = 1,136.43 : x
  2. Step 2: Convert to fraction form
    1,290.20/1,934.55 = 1,136.43/x
  3. Step 3: Cross multiply
    1,290.20x = 1,934.55 × 1,136.43
  4. Step 4: Simplify right side
    1,290.20x = 2,198,480.66
  5. Step 5: Solve for x
    x = 2,198,480.66/1,290.20
  6. Step 6: Final answer
    x = 1,703.99

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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.