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Finding the Fourth Proportional to 5,275, 7,912.68 and 1,763.92

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Solution

The fourth proportional to 5,275, 7,912.68 and 1,763.92 is: 2,645.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,275 : 7,912.68 = 1,763.92 : x
  2. Step 2: Convert to fraction form
    5,275/7,912.68 = 1,763.92/x
  3. Step 3: Cross multiply
    5,275x = 7,912.68 × 1,763.92
  4. Step 4: Simplify right side
    5,275x = 13,957,334.51
  5. Step 5: Solve for x
    x = 13,957,334.51/5,275
  6. Step 6: Final answer
    x = 2,645.94

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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.