Home / 2,540.17-3,505.35-1,421.20

Finding the Fourth Proportional to 2,540.17, 3,505.35 and 1,421.20

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Solution

The fourth proportional to 2,540.17, 3,505.35 and 1,421.20 is: 1,961.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,540.17 : 3,505.35 = 1,421.20 : x
  2. Step 2: Convert to fraction form
    2,540.17/3,505.35 = 1,421.20/x
  3. Step 3: Cross multiply
    2,540.17x = 3,505.35 × 1,421.20
  4. Step 4: Simplify right side
    2,540.17x = 4,981,794.66
  5. Step 5: Solve for x
    x = 4,981,794.66/2,540.17
  6. Step 6: Final answer
    x = 1,961.21

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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.