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Finding the Fourth Proportional to 3,816.80, 5,725.20 and 3,654.80

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Solution

The fourth proportional to 3,816.80, 5,725.20 and 3,654.80 is: 5,482.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,816.80 : 5,725.20 = 3,654.80 : x
  2. Step 2: Convert to fraction form
    3,816.80/5,725.20 = 3,654.80/x
  3. Step 3: Cross multiply
    3,816.80x = 5,725.20 × 3,654.80
  4. Step 4: Simplify right side
    3,816.80x = 20,924,460.96
  5. Step 5: Solve for x
    x = 20,924,460.96/3,816.80
  6. Step 6: Final answer
    x = 5,482.20

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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.