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Finding the Fourth Proportional to 799.58, 1,200.18 and 511.22

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Solution

The fourth proportional to 799.58, 1,200.18 and 511.22 is: 767.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    799.58 : 1,200.18 = 511.22 : x
  2. Step 2: Convert to fraction form
    799.58/1,200.18 = 511.22/x
  3. Step 3: Cross multiply
    799.58x = 1,200.18 × 511.22
  4. Step 4: Simplify right side
    799.58x = 613,556.02
  5. Step 5: Solve for x
    x = 613,556.02/799.58
  6. Step 6: Final answer
    x = 767.35

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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.