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Finding the Fourth Proportional to 663,623.34, 915,801.11 and 361,817.34

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Solution

The fourth proportional to 663,623.34, 915,801.11 and 361,817.34 is: 499,308.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,623.34 : 915,801.11 = 361,817.34 : x
  2. Step 2: Convert to fraction form
    663,623.34/915,801.11 = 361,817.34/x
  3. Step 3: Cross multiply
    663,623.34x = 915,801.11 × 361,817.34
  4. Step 4: Simplify right side
    663,623.34x = 331,352,721,589.25
  5. Step 5: Solve for x
    x = 331,352,721,589.25/663,623.34
  6. Step 6: Final answer
    x = 499,308.42

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Half scale
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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.