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Finding the Fourth Proportional to 259,486.80, 389,230.20 and 220,120.80

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Solution

The fourth proportional to 259,486.80, 389,230.20 and 220,120.80 is: 330,181.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,486.80 : 389,230.20 = 220,120.80 : x
  2. Step 2: Convert to fraction form
    259,486.80/389,230.20 = 220,120.80/x
  3. Step 3: Cross multiply
    259,486.80x = 389,230.20 × 220,120.80
  4. Step 4: Simplify right side
    259,486.80x = 85,677,663,008.16
  5. Step 5: Solve for x
    x = 85,677,663,008.16/259,486.80
  6. Step 6: Final answer
    x = 330,181.20

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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.