Home / 2,142.19-2,956.44-1,257.98

Finding the Fourth Proportional to 2,142.19, 2,956.44 and 1,257.98

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Solution

The fourth proportional to 2,142.19, 2,956.44 and 1,257.98 is: 1,736.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,142.19 : 2,956.44 = 1,257.98 : x
  2. Step 2: Convert to fraction form
    2,142.19/2,956.44 = 1,257.98/x
  3. Step 3: Cross multiply
    2,142.19x = 2,956.44 × 1,257.98
  4. Step 4: Simplify right side
    2,142.19x = 3,719,142.39
  5. Step 5: Solve for x
    x = 3,719,142.39/2,142.19
  6. Step 6: Final answer
    x = 1,736.14

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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.