Home / 2,939.21-4,056.78-1,889.45

Finding the Fourth Proportional to 2,939.21, 4,056.78 and 1,889.45

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Solution

The fourth proportional to 2,939.21, 4,056.78 and 1,889.45 is: 2,607.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,939.21 : 4,056.78 = 1,889.45 : x
  2. Step 2: Convert to fraction form
    2,939.21/4,056.78 = 1,889.45/x
  3. Step 3: Cross multiply
    2,939.21x = 4,056.78 × 1,889.45
  4. Step 4: Simplify right side
    2,939.21x = 7,665,062.69
  5. Step 5: Solve for x
    x = 7,665,062.69/2,939.21
  6. Step 6: Final answer
    x = 2,607.87

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.