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Finding the Fourth Proportional to 668,999.03, 923,085.09 and 407,178.96

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Solution

The fourth proportional to 668,999.03, 923,085.09 and 407,178.96 is: 561,825.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    668,999.03 : 923,085.09 = 407,178.96 : x
  2. Step 2: Convert to fraction form
    668,999.03/923,085.09 = 407,178.96/x
  3. Step 3: Cross multiply
    668,999.03x = 923,085.09 × 407,178.96
  4. Step 4: Simplify right side
    668,999.03x = 375,860,826,937.71
  5. Step 5: Solve for x
    x = 375,860,826,937.71/668,999.03
  6. Step 6: Final answer
    x = 561,825.67

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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.