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Finding the Fourth Proportional to 261,778.80, 393,251.40 and 251,151.60

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Solution

The fourth proportional to 261,778.80, 393,251.40 and 251,151.60 is: 377,286.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,778.80 : 393,251.40 = 251,151.60 : x
  2. Step 2: Convert to fraction form
    261,778.80/393,251.40 = 251,151.60/x
  3. Step 3: Cross multiply
    261,778.80x = 393,251.40 × 251,151.60
  4. Step 4: Simplify right side
    261,778.80x = 98,765,718,312.24
  5. Step 5: Solve for x
    x = 98,765,718,312.24/261,778.80
  6. Step 6: Final answer
    x = 377,286.92

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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.