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Finding the Fourth Proportional to 367,989.40, 551,724.90 and 168,405.40

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Solution

The fourth proportional to 367,989.40, 551,724.90 and 168,405.40 is: 252,489.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    367,989.40 : 551,724.90 = 168,405.40 : x
  2. Step 2: Convert to fraction form
    367,989.40/551,724.90 = 168,405.40/x
  3. Step 3: Cross multiply
    367,989.40x = 551,724.90 × 168,405.40
  4. Step 4: Simplify right side
    367,989.40x = 92,913,452,474.46
  5. Step 5: Solve for x
    x = 92,913,452,474.46/367,989.40
  6. Step 6: Final answer
    x = 252,489.48

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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.