Home / 2,135.32-2,939.82-1,690.84

Finding the Fourth Proportional to 2,135.32, 2,939.82 and 1,690.84

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Solution

The fourth proportional to 2,135.32, 2,939.82 and 1,690.84 is: 2,327.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,135.32 : 2,939.82 = 1,690.84 : x
  2. Step 2: Convert to fraction form
    2,135.32/2,939.82 = 1,690.84/x
  3. Step 3: Cross multiply
    2,135.32x = 2,939.82 × 1,690.84
  4. Step 4: Simplify right side
    2,135.32x = 4,970,765.25
  5. Step 5: Solve for x
    x = 4,970,765.25/2,135.32
  6. Step 6: Final answer
    x = 2,327.88

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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.