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Finding the Fourth Proportional to 1,253.75, 1,730.38 and 1,198.38

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Solution

The fourth proportional to 1,253.75, 1,730.38 and 1,198.38 is: 1,653.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,253.75 : 1,730.38 = 1,198.38 : x
  2. Step 2: Convert to fraction form
    1,253.75/1,730.38 = 1,198.38/x
  3. Step 3: Cross multiply
    1,253.75x = 1,730.38 × 1,198.38
  4. Step 4: Simplify right side
    1,253.75x = 2,073,652.78
  5. Step 5: Solve for x
    x = 2,073,652.78/1,253.75
  6. Step 6: Final answer
    x = 1,653.96

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1.5x scale

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.