Home / 1,985.60-2,738.76-1,198.64

Finding the Fourth Proportional to 1,985.60, 2,738.76 and 1,198.64

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Solution

The fourth proportional to 1,985.60, 2,738.76 and 1,198.64 is: 1,653.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,985.60 : 2,738.76 = 1,198.64 : x
  2. Step 2: Convert to fraction form
    1,985.60/2,738.76 = 1,198.64/x
  3. Step 3: Cross multiply
    1,985.60x = 2,738.76 × 1,198.64
  4. Step 4: Simplify right side
    1,985.60x = 3,282,787.29
  5. Step 5: Solve for x
    x = 3,282,787.29/1,985.60
  6. Step 6: Final answer
    x = 1,653.30

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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.