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Finding the Fourth Proportional to 511,739.47, 766,347.73 and 321,728.46

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Solution

The fourth proportional to 511,739.47, 766,347.73 and 321,728.46 is: 481,799.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    511,739.47 : 766,347.73 = 321,728.46 : x
  2. Step 2: Convert to fraction form
    511,739.47/766,347.73 = 321,728.46/x
  3. Step 3: Cross multiply
    511,739.47x = 766,347.73 × 321,728.46
  4. Step 4: Simplify right side
    511,739.47x = 246,555,873,128.99
  5. Step 5: Solve for x
    x = 246,555,873,128.99/511,739.47
  6. Step 6: Final answer
    x = 481,799.60

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1.5x scale

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.