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Finding the Fourth Proportional to 259,477.02, 389,238.21 and 72,489.06

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Solution

The fourth proportional to 259,477.02, 389,238.21 and 72,489.06 is: 108,739.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,477.02 : 389,238.21 = 72,489.06 : x
  2. Step 2: Convert to fraction form
    259,477.02/389,238.21 = 72,489.06/x
  3. Step 3: Cross multiply
    259,477.02x = 389,238.21 × 72,489.06
  4. Step 4: Simplify right side
    259,477.02x = 28,215,511,958.98
  5. Step 5: Solve for x
    x = 28,215,511,958.98/259,477.02
  6. Step 6: Final answer
    x = 108,739.93

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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.