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Finding the Fourth Proportional to 198,998.80, 298,498.20 and 74,333.20

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Solution

The fourth proportional to 198,998.80, 298,498.20 and 74,333.20 is: 111,499.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    198,998.80 : 298,498.20 = 74,333.20 : x
  2. Step 2: Convert to fraction form
    198,998.80/298,498.20 = 74,333.20/x
  3. Step 3: Cross multiply
    198,998.80x = 298,498.20 × 74,333.20
  4. Step 4: Simplify right side
    198,998.80x = 22,188,326,400.24
  5. Step 5: Solve for x
    x = 22,188,326,400.24/198,998.80
  6. Step 6: Final answer
    x = 111,499.80

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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.