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Finding the Fourth Proportional to 668,839.77, 923,765.49 and 440,418.15

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Solution

The fourth proportional to 668,839.77, 923,765.49 and 440,418.15 is: 608,281.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    668,839.77 : 923,765.49 = 440,418.15 : x
  2. Step 2: Convert to fraction form
    668,839.77/923,765.49 = 440,418.15/x
  3. Step 3: Cross multiply
    668,839.77x = 923,765.49 × 440,418.15
  4. Step 4: Simplify right side
    668,839.77x = 406,843,088,139.64
  5. Step 5: Solve for x
    x = 406,843,088,139.64/668,839.77
  6. Step 6: Final answer
    x = 608,281.84

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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.