Home / 1,939.86-2,677.26-1,276.92

Finding the Fourth Proportional to 1,939.86, 2,677.26 and 1,276.92

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Solution

The fourth proportional to 1,939.86, 2,677.26 and 1,276.92 is: 1,762.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,939.86 : 2,677.26 = 1,276.92 : x
  2. Step 2: Convert to fraction form
    1,939.86/2,677.26 = 1,276.92/x
  3. Step 3: Cross multiply
    1,939.86x = 2,677.26 × 1,276.92
  4. Step 4: Simplify right side
    1,939.86x = 3,418,646.84
  5. Step 5: Solve for x
    x = 3,418,646.84/1,939.86
  6. Step 6: Final answer
    x = 1,762.32

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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.