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Finding the Fourth Proportional to 198,620.40, 297,930.60 and 65,521.20

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Solution

The fourth proportional to 198,620.40, 297,930.60 and 65,521.20 is: 98,281.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    198,620.40 : 297,930.60 = 65,521.20 : x
  2. Step 2: Convert to fraction form
    198,620.40/297,930.60 = 65,521.20/x
  3. Step 3: Cross multiply
    198,620.40x = 297,930.60 × 65,521.20
  4. Step 4: Simplify right side
    198,620.40x = 19,520,770,428.72
  5. Step 5: Solve for x
    x = 19,520,770,428.72/198,620.40
  6. Step 6: Final answer
    x = 98,281.80

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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.