Home / 1,965.60-2,712.78-1,257.48

Finding the Fourth Proportional to 1,965.60, 2,712.78 and 1,257.48

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Solution

The fourth proportional to 1,965.60, 2,712.78 and 1,257.48 is: 1,735.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,965.60 : 2,712.78 = 1,257.48 : x
  2. Step 2: Convert to fraction form
    1,965.60/2,712.78 = 1,257.48/x
  3. Step 3: Cross multiply
    1,965.60x = 2,712.78 × 1,257.48
  4. Step 4: Simplify right side
    1,965.60x = 3,411,266.59
  5. Step 5: Solve for x
    x = 3,411,266.59/1,965.60
  6. Step 6: Final answer
    x = 1,735.48

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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.