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Finding the Fourth Proportional to 413,213.30, 619,710.60 and 128,903.30

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Solution

The fourth proportional to 413,213.30, 619,710.60 and 128,903.30 is: 193,320.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    413,213.30 : 619,710.60 = 128,903.30 : x
  2. Step 2: Convert to fraction form
    413,213.30/619,710.60 = 128,903.30/x
  3. Step 3: Cross multiply
    413,213.30x = 619,710.60 × 128,903.30
  4. Step 4: Simplify right side
    413,213.30x = 79,882,741,384.98
  5. Step 5: Solve for x
    x = 79,882,741,384.98/413,213.30
  6. Step 6: Final answer
    x = 193,320.84

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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.