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Finding the Fourth Proportional to 799.12, 1,190.63 and 757.18

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Solution

The fourth proportional to 799.12, 1,190.63 and 757.18 is: 1,128.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    799.12 : 1,190.63 = 757.18 : x
  2. Step 2: Convert to fraction form
    799.12/1,190.63 = 757.18/x
  3. Step 3: Cross multiply
    799.12x = 1,190.63 × 757.18
  4. Step 4: Simplify right side
    799.12x = 901,521.22
  5. Step 5: Solve for x
    x = 901,521.22/799.12
  6. Step 6: Final answer
    x = 1,128.14

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.