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Finding the Fourth Proportional to 260,990.80, 391,486.20 and 225,998.80

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Solution

The fourth proportional to 260,990.80, 391,486.20 and 225,998.80 is: 338,998.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,990.80 : 391,486.20 = 225,998.80 : x
  2. Step 2: Convert to fraction form
    260,990.80/391,486.20 = 225,998.80/x
  3. Step 3: Cross multiply
    260,990.80x = 391,486.20 × 225,998.80
  4. Step 4: Simplify right side
    260,990.80x = 88,475,411,416.56
  5. Step 5: Solve for x
    x = 88,475,411,416.56/260,990.80
  6. Step 6: Final answer
    x = 338,998.20

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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.