Home / 1,891.30-2,607.78-1,331.86

Finding the Fourth Proportional to 1,891.30, 2,607.78 and 1,331.86

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Solution

The fourth proportional to 1,891.30, 2,607.78 and 1,331.86 is: 1,836.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,891.30 : 2,607.78 = 1,331.86 : x
  2. Step 2: Convert to fraction form
    1,891.30/2,607.78 = 1,331.86/x
  3. Step 3: Cross multiply
    1,891.30x = 2,607.78 × 1,331.86
  4. Step 4: Simplify right side
    1,891.30x = 3,473,197.87
  5. Step 5: Solve for x
    x = 3,473,197.87/1,891.30
  6. Step 6: Final answer
    x = 1,836.41

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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.