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Finding the Fourth Proportional to 668,996.77, 923,081.98 and 407,176.70

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Solution

The fourth proportional to 668,996.77, 923,081.98 and 407,176.70 is: 561,822.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    668,996.77 : 923,081.98 = 407,176.70 : x
  2. Step 2: Convert to fraction form
    668,996.77/923,081.98 = 407,176.70/x
  3. Step 3: Cross multiply
    668,996.77x = 923,081.98 × 407,176.70
  4. Step 4: Simplify right side
    668,996.77x = 375,857,479,588.14
  5. Step 5: Solve for x
    x = 375,857,479,588.14/668,996.77
  6. Step 6: Final answer
    x = 561,822.56

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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.