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Finding the Fourth Proportional to 259,493.80, 389,240.70 and 220,127.80

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Solution

The fourth proportional to 259,493.80, 389,240.70 and 220,127.80 is: 330,191.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,493.80 : 389,240.70 = 220,127.80 : x
  2. Step 2: Convert to fraction form
    259,493.80/389,240.70 = 220,127.80/x
  3. Step 3: Cross multiply
    259,493.80x = 389,240.70 × 220,127.80
  4. Step 4: Simplify right side
    259,493.80x = 85,682,698,961.46
  5. Step 5: Solve for x
    x = 85,682,698,961.46/259,493.80
  6. Step 6: Final answer
    x = 330,191.70

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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.