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Finding the Fourth Proportional to 1,274.99, 1,912.39 and 350.48

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Solution

The fourth proportional to 1,274.99, 1,912.39 and 350.48 is: 525.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,274.99 : 1,912.39 = 350.48 : x
  2. Step 2: Convert to fraction form
    1,274.99/1,912.39 = 350.48/x
  3. Step 3: Cross multiply
    1,274.99x = 1,912.39 × 350.48
  4. Step 4: Simplify right side
    1,274.99x = 670,249.57
  5. Step 5: Solve for x
    x = 670,249.57/1,274.99
  6. Step 6: Final answer
    x = 525.69

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1.5x scale

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.