Home / 2,540.39-3,505.64-1,421.45

Finding the Fourth Proportional to 2,540.39, 3,505.64 and 1,421.45

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Solution

The fourth proportional to 2,540.39, 3,505.64 and 1,421.45 is: 1,961.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,540.39 : 3,505.64 = 1,421.45 : x
  2. Step 2: Convert to fraction form
    2,540.39/3,505.64 = 1,421.45/x
  3. Step 3: Cross multiply
    2,540.39x = 3,505.64 × 1,421.45
  4. Step 4: Simplify right side
    2,540.39x = 4,983,067.34
  5. Step 5: Solve for x
    x = 4,983,067.34/2,540.39
  6. Step 6: Final answer
    x = 1,961.54

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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.