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Finding the Fourth Proportional to 1,275.33, 1,912.77 and 350.68

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Solution

The fourth proportional to 1,275.33, 1,912.77 and 350.68 is: 525.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,275.33 : 1,912.77 = 350.68 : x
  2. Step 2: Convert to fraction form
    1,275.33/1,912.77 = 350.68/x
  3. Step 3: Cross multiply
    1,275.33x = 1,912.77 × 350.68
  4. Step 4: Simplify right side
    1,275.33x = 670,769.97
  5. Step 5: Solve for x
    x = 670,769.97/1,275.33
  6. Step 6: Final answer
    x = 525.96

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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.