Home / 2,141.78-2,955.69-1,257.84

Finding the Fourth Proportional to 2,141.78, 2,955.69 and 1,257.84

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Solution

The fourth proportional to 2,141.78, 2,955.69 and 1,257.84 is: 1,735.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,141.78 : 2,955.69 = 1,257.84 : x
  2. Step 2: Convert to fraction form
    2,141.78/2,955.69 = 1,257.84/x
  3. Step 3: Cross multiply
    2,141.78x = 2,955.69 × 1,257.84
  4. Step 4: Simplify right side
    2,141.78x = 3,717,785.11
  5. Step 5: Solve for x
    x = 3,717,785.11/2,141.78
  6. Step 6: Final answer
    x = 1,735.84

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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.