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Finding the Fourth Proportional to 638,266.60, 956,136.30 and 413,783.20

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Solution

The fourth proportional to 638,266.60, 956,136.30 and 413,783.20 is: 619,855.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,266.60 : 956,136.30 = 413,783.20 : x
  2. Step 2: Convert to fraction form
    638,266.60/956,136.30 = 413,783.20/x
  3. Step 3: Cross multiply
    638,266.60x = 956,136.30 × 413,783.20
  4. Step 4: Simplify right side
    638,266.60x = 395,633,137,850.16
  5. Step 5: Solve for x
    x = 395,633,137,850.16/638,266.60
  6. Step 6: Final answer
    x = 619,855.62

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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.