Home / 2,142.18-2,956.62-1,257.99

Finding the Fourth Proportional to 2,142.18, 2,956.62 and 1,257.99

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Solution

The fourth proportional to 2,142.18, 2,956.62 and 1,257.99 is: 1,736.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,142.18 : 2,956.62 = 1,257.99 : x
  2. Step 2: Convert to fraction form
    2,142.18/2,956.62 = 1,257.99/x
  3. Step 3: Cross multiply
    2,142.18x = 2,956.62 × 1,257.99
  4. Step 4: Simplify right side
    2,142.18x = 3,719,398.39
  5. Step 5: Solve for x
    x = 3,719,398.39/2,142.18
  6. Step 6: Final answer
    x = 1,736.27

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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.