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Finding the Fourth Proportional to 520,094.20, 780,141.30 and 253,895.80

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Solution

The fourth proportional to 520,094.20, 780,141.30 and 253,895.80 is: 380,843.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,094.20 : 780,141.30 = 253,895.80 : x
  2. Step 2: Convert to fraction form
    520,094.20/780,141.30 = 253,895.80/x
  3. Step 3: Cross multiply
    520,094.20x = 780,141.30 × 253,895.80
  4. Step 4: Simplify right side
    520,094.20x = 198,074,599,476.54
  5. Step 5: Solve for x
    x = 198,074,599,476.54/520,094.20
  6. Step 6: Final answer
    x = 380,843.70

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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.