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Finding the Fourth Proportional to 505,955.21, 757,172.25 and 313,739.78

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Solution

The fourth proportional to 505,955.21, 757,172.25 and 313,739.78 is: 469,517.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    505,955.21 : 757,172.25 = 313,739.78 : x
  2. Step 2: Convert to fraction form
    505,955.21/757,172.25 = 313,739.78/x
  3. Step 3: Cross multiply
    505,955.21x = 757,172.25 × 313,739.78
  4. Step 4: Simplify right side
    505,955.21x = 237,555,051,351.24
  5. Step 5: Solve for x
    x = 237,555,051,351.24/505,955.21
  6. Step 6: Final answer
    x = 469,517.95

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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.