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Finding the Fourth Proportional to 3,877.92, 5,812.80 and 1,684.80

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Solution

The fourth proportional to 3,877.92, 5,812.80 and 1,684.80 is: 2,525.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,877.92 : 5,812.80 = 1,684.80 : x
  2. Step 2: Convert to fraction form
    3,877.92/5,812.80 = 1,684.80/x
  3. Step 3: Cross multiply
    3,877.92x = 5,812.80 × 1,684.80
  4. Step 4: Simplify right side
    3,877.92x = 9,793,405.44
  5. Step 5: Solve for x
    x = 9,793,405.44/3,877.92
  6. Step 6: Final answer
    x = 2,525.43

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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.