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Finding the Fourth Proportional to 949.51, 1,420.31 and 799.31

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Solution

The fourth proportional to 949.51, 1,420.31 and 799.31 is: 1,195.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    949.51 : 1,420.31 = 799.31 : x
  2. Step 2: Convert to fraction form
    949.51/1,420.31 = 799.31/x
  3. Step 3: Cross multiply
    949.51x = 1,420.31 × 799.31
  4. Step 4: Simplify right side
    949.51x = 1,135,267.99
  5. Step 5: Solve for x
    x = 1,135,267.99/949.51
  6. Step 6: Final answer
    x = 1,195.64

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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.