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Finding the Fourth Proportional to 668,842.85, 923,769.78 and 440,421.23

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Solution

The fourth proportional to 668,842.85, 923,769.78 and 440,421.23 is: 608,286.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    668,842.85 : 923,769.78 = 440,421.23 : x
  2. Step 2: Convert to fraction form
    668,842.85/923,769.78 = 440,421.23/x
  3. Step 3: Cross multiply
    668,842.85x = 923,769.78 × 440,421.23
  4. Step 4: Simplify right side
    668,842.85x = 406,847,822,744.43
  5. Step 5: Solve for x
    x = 406,847,822,744.43/668,842.85
  6. Step 6: Final answer
    x = 608,286.12

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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.