Home / 2,939.78-4,057.76-1,681.55

Finding the Fourth Proportional to 2,939.78, 4,057.76 and 1,681.55

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Solution

The fourth proportional to 2,939.78, 4,057.76 and 1,681.55 is: 2,321.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,939.78 : 4,057.76 = 1,681.55 : x
  2. Step 2: Convert to fraction form
    2,939.78/4,057.76 = 1,681.55/x
  3. Step 3: Cross multiply
    2,939.78x = 4,057.76 × 1,681.55
  4. Step 4: Simplify right side
    2,939.78x = 6,823,326.33
  5. Step 5: Solve for x
    x = 6,823,326.33/2,939.78
  6. Step 6: Final answer
    x = 2,321.03

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1.5x scale

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.