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Finding the Fourth Proportional to 799.60, 1,199.57 and 388.96

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Solution

The fourth proportional to 799.60, 1,199.57 and 388.96 is: 583.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    799.60 : 1,199.57 = 388.96 : x
  2. Step 2: Convert to fraction form
    799.60/1,199.57 = 388.96/x
  3. Step 3: Cross multiply
    799.60x = 1,199.57 × 388.96
  4. Step 4: Simplify right side
    799.60x = 466,584.75
  5. Step 5: Solve for x
    x = 466,584.75/799.60
  6. Step 6: Final answer
    x = 583.52

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.