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Finding the Fourth Proportional to 3,928.79, 5,893.22 and 1,155.51

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Solution

The fourth proportional to 3,928.79, 5,893.22 and 1,155.51 is: 1,733.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,928.79 : 5,893.22 = 1,155.51 : x
  2. Step 2: Convert to fraction form
    3,928.79/5,893.22 = 1,155.51/x
  3. Step 3: Cross multiply
    3,928.79x = 5,893.22 × 1,155.51
  4. Step 4: Simplify right side
    3,928.79x = 6,809,668.86
  5. Step 5: Solve for x
    x = 6,809,668.86/3,928.79
  6. Step 6: Final answer
    x = 1,733.28

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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.