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Finding the Fourth Proportional to 1,623.64, 2,240.79 and 994.59

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Solution

The fourth proportional to 1,623.64, 2,240.79 and 994.59 is: 1,372.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,623.64 : 2,240.79 = 994.59 : x
  2. Step 2: Convert to fraction form
    1,623.64/2,240.79 = 994.59/x
  3. Step 3: Cross multiply
    1,623.64x = 2,240.79 × 994.59
  4. Step 4: Simplify right side
    1,623.64x = 2,228,667.33
  5. Step 5: Solve for x
    x = 2,228,667.33/1,623.64
  6. Step 6: Final answer
    x = 1,372.64

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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.