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Finding the Fourth Proportional to 410,384.20, 615,633.90 and 129,872.20

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Solution

The fourth proportional to 410,384.20, 615,633.90 and 129,872.20 is: 194,826.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    410,384.20 : 615,633.90 = 129,872.20 : x
  2. Step 2: Convert to fraction form
    410,384.20/615,633.90 = 129,872.20/x
  3. Step 3: Cross multiply
    410,384.20x = 615,633.90 × 129,872.20
  4. Step 4: Simplify right side
    410,384.20x = 79,953,728,987.58
  5. Step 5: Solve for x
    x = 79,953,728,987.58/410,384.20
  6. Step 6: Final answer
    x = 194,826.53

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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.