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Finding the Fourth Proportional to 198,998.40, 298,303.20 and 178,003.20

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Solution

The fourth proportional to 198,998.40, 298,303.20 and 178,003.20 is: 266,830.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    198,998.40 : 298,303.20 = 178,003.20 : x
  2. Step 2: Convert to fraction form
    198,998.40/298,303.20 = 178,003.20/x
  3. Step 3: Cross multiply
    198,998.40x = 298,303.20 × 178,003.20
  4. Step 4: Simplify right side
    198,998.40x = 53,098,924,170.24
  5. Step 5: Solve for x
    x = 53,098,924,170.24/198,998.40
  6. Step 6: Final answer
    x = 266,830.91

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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.