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Finding the Fourth Proportional to 3,769.92, 5,655.36 and 1,920.96

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Solution

The fourth proportional to 3,769.92, 5,655.36 and 1,920.96 is: 2,881.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,769.92 : 5,655.36 = 1,920.96 : x
  2. Step 2: Convert to fraction form
    3,769.92/5,655.36 = 1,920.96/x
  3. Step 3: Cross multiply
    3,769.92x = 5,655.36 × 1,920.96
  4. Step 4: Simplify right side
    3,769.92x = 10,863,720.35
  5. Step 5: Solve for x
    x = 10,863,720.35/3,769.92
  6. Step 6: Final answer
    x = 2,881.68

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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.