Home / 3,878.56-5,816.58-1,686.64

Finding the Fourth Proportional to 3,878.56, 5,816.58 and 1,686.64

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Solution

The fourth proportional to 3,878.56, 5,816.58 and 1,686.64 is: 2,529.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,878.56 : 5,816.58 = 1,686.64 : x
  2. Step 2: Convert to fraction form
    3,878.56/5,816.58 = 1,686.64/x
  3. Step 3: Cross multiply
    3,878.56x = 5,816.58 × 1,686.64
  4. Step 4: Simplify right side
    3,878.56x = 9,810,476.49
  5. Step 5: Solve for x
    x = 9,810,476.49/3,878.56
  6. Step 6: Final answer
    x = 2,529.41

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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.