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Finding the Fourth Proportional to 3,872.28, 5,807.28 and 1,680.48

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Solution

The fourth proportional to 3,872.28, 5,807.28 and 1,680.48 is: 2,520.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,872.28 : 5,807.28 = 1,680.48 : x
  2. Step 2: Convert to fraction form
    3,872.28/5,807.28 = 1,680.48/x
  3. Step 3: Cross multiply
    3,872.28x = 5,807.28 × 1,680.48
  4. Step 4: Simplify right side
    3,872.28x = 9,759,017.89
  5. Step 5: Solve for x
    x = 9,759,017.89/3,872.28
  6. Step 6: Final answer
    x = 2,520.23

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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.