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Finding the Fourth Proportional to 411,211.20, 617,047.20 and 174,513.60

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Solution

The fourth proportional to 411,211.20, 617,047.20 and 174,513.60 is: 261,868.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    411,211.20 : 617,047.20 = 174,513.60 : x
  2. Step 2: Convert to fraction form
    411,211.20/617,047.20 = 174,513.60/x
  3. Step 3: Cross multiply
    411,211.20x = 617,047.20 × 174,513.60
  4. Step 4: Simplify right side
    411,211.20x = 107,683,128,241.92
  5. Step 5: Solve for x
    x = 107,683,128,241.92/411,211.20
  6. Step 6: Final answer
    x = 261,868.18

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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.