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Finding the Fourth Proportional to 261,206.20, 391,153.20 and 171,976.60

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Solution

The fourth proportional to 261,206.20, 391,153.20 and 171,976.60 is: 257,532.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,206.20 : 391,153.20 = 171,976.60 : x
  2. Step 2: Convert to fraction form
    261,206.20/391,153.20 = 171,976.60/x
  3. Step 3: Cross multiply
    261,206.20x = 391,153.20 × 171,976.60
  4. Step 4: Simplify right side
    261,206.20x = 67,269,197,415.12
  5. Step 5: Solve for x
    x = 67,269,197,415.12/261,206.20
  6. Step 6: Final answer
    x = 257,532.93

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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.