Home / 1,939.86-2,678.85-1,935.90

Finding the Fourth Proportional to 1,939.86, 2,678.85 and 1,935.90

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Solution

The fourth proportional to 1,939.86, 2,678.85 and 1,935.90 is: 2,673.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,939.86 : 2,678.85 = 1,935.90 : x
  2. Step 2: Convert to fraction form
    1,939.86/2,678.85 = 1,935.90/x
  3. Step 3: Cross multiply
    1,939.86x = 2,678.85 × 1,935.90
  4. Step 4: Simplify right side
    1,939.86x = 5,185,985.72
  5. Step 5: Solve for x
    x = 5,185,985.72/1,939.86
  6. Step 6: Final answer
    x = 2,673.38

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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.