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Finding the Fourth Proportional to 259,673.80, 389,481.90 and 72,704.20

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Solution

The fourth proportional to 259,673.80, 389,481.90 and 72,704.20 is: 109,048.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,673.80 : 389,481.90 = 72,704.20 : x
  2. Step 2: Convert to fraction form
    259,673.80/389,481.90 = 72,704.20/x
  3. Step 3: Cross multiply
    259,673.80x = 389,481.90 × 72,704.20
  4. Step 4: Simplify right side
    259,673.80x = 28,316,969,953.98
  5. Step 5: Solve for x
    x = 28,316,969,953.98/259,673.80
  6. Step 6: Final answer
    x = 109,048.24

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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.