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Finding the Fourth Proportional to 398,737.20, 598,211.40 and 174,001.20

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Solution

The fourth proportional to 398,737.20, 598,211.40 and 174,001.20 is: 261,047.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,737.20 : 598,211.40 = 174,001.20 : x
  2. Step 2: Convert to fraction form
    398,737.20/598,211.40 = 174,001.20/x
  3. Step 3: Cross multiply
    398,737.20x = 598,211.40 × 174,001.20
  4. Step 4: Simplify right side
    398,737.20x = 104,089,501,453.68
  5. Step 5: Solve for x
    x = 104,089,501,453.68/398,737.20
  6. Step 6: Final answer
    x = 261,047.88

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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.