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Finding the Fourth Proportional to 198,848.18, 298,318.98 and 65,728.44

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Solution

The fourth proportional to 198,848.18, 298,318.98 and 65,728.44 is: 98,608.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    198,848.18 : 298,318.98 = 65,728.44 : x
  2. Step 2: Convert to fraction form
    198,848.18/298,318.98 = 65,728.44/x
  3. Step 3: Cross multiply
    198,848.18x = 298,318.98 × 65,728.44
  4. Step 4: Simplify right side
    198,848.18x = 19,608,041,177.79
  5. Step 5: Solve for x
    x = 19,608,041,177.79/198,848.18
  6. Step 6: Final answer
    x = 98,608.10

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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.