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Finding the Fourth Proportional to 668,910.75, 923,096.85 and 400,638.75

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Solution

The fourth proportional to 668,910.75, 923,096.85 and 400,638.75 is: 552,881.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    668,910.75 : 923,096.85 = 400,638.75 : x
  2. Step 2: Convert to fraction form
    668,910.75/923,096.85 = 400,638.75/x
  3. Step 3: Cross multiply
    668,910.75x = 923,096.85 × 400,638.75
  4. Step 4: Simplify right side
    668,910.75x = 369,828,368,112.94
  5. Step 5: Solve for x
    x = 369,828,368,112.94/668,910.75
  6. Step 6: Final answer
    x = 552,881.48

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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.