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Finding the Fourth Proportional to 799.37, 1,199.60 and 312.36

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Solution

The fourth proportional to 799.37, 1,199.60 and 312.36 is: 468.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    799.37 : 1,199.60 = 312.36 : x
  2. Step 2: Convert to fraction form
    799.37/1,199.60 = 312.36/x
  3. Step 3: Cross multiply
    799.37x = 1,199.60 × 312.36
  4. Step 4: Simplify right side
    799.37x = 374,705.49
  5. Step 5: Solve for x
    x = 374,705.49/799.37
  6. Step 6: Final answer
    x = 468.75

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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.