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Finding the Fourth Proportional to 512,839.20, 769,258.80 and 453,790.20

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Solution

The fourth proportional to 512,839.20, 769,258.80 and 453,790.20 is: 680,685.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    512,839.20 : 769,258.80 = 453,790.20 : x
  2. Step 2: Convert to fraction form
    512,839.20/769,258.80 = 453,790.20/x
  3. Step 3: Cross multiply
    512,839.20x = 769,258.80 × 453,790.20
  4. Step 4: Simplify right side
    512,839.20x = 349,082,104,703.76
  5. Step 5: Solve for x
    x = 349,082,104,703.76/512,839.20
  6. Step 6: Final answer
    x = 680,685.30

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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.