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Finding the Fourth Proportional to 418,986.45, 628,542.21 and 194,369.59

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Solution

The fourth proportional to 418,986.45, 628,542.21 and 194,369.59 is: 291,583.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,986.45 : 628,542.21 = 194,369.59 : x
  2. Step 2: Convert to fraction form
    418,986.45/628,542.21 = 194,369.59/x
  3. Step 3: Cross multiply
    418,986.45x = 628,542.21 × 194,369.59
  4. Step 4: Simplify right side
    418,986.45x = 122,169,494,937.73
  5. Step 5: Solve for x
    x = 122,169,494,937.73/418,986.45
  6. Step 6: Final answer
    x = 291,583.40

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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.