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Finding the Fourth Proportional to 3,901.92, 5,853.45 and 1,128.62

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Solution

The fourth proportional to 3,901.92, 5,853.45 and 1,128.62 is: 1,693.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,901.92 : 5,853.45 = 1,128.62 : x
  2. Step 2: Convert to fraction form
    3,901.92/5,853.45 = 1,128.62/x
  3. Step 3: Cross multiply
    3,901.92x = 5,853.45 × 1,128.62
  4. Step 4: Simplify right side
    3,901.92x = 6,606,300.33
  5. Step 5: Solve for x
    x = 6,606,300.33/3,901.92
  6. Step 6: Final answer
    x = 1,693.09

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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.