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Finding the Fourth Proportional to 198,848.05, 298,318.79 and 65,728.32

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Solution

The fourth proportional to 198,848.05, 298,318.79 and 65,728.32 is: 98,607.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    198,848.05 : 298,318.79 = 65,728.32 : x
  2. Step 2: Convert to fraction form
    198,848.05/298,318.79 = 65,728.32/x
  3. Step 3: Cross multiply
    198,848.05x = 298,318.79 × 65,728.32
  4. Step 4: Simplify right side
    198,848.05x = 19,607,992,891.13
  5. Step 5: Solve for x
    x = 19,607,992,891.13/198,848.05
  6. Step 6: Final answer
    x = 98,607.92

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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.