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Finding the Fourth Proportional to 470,023.76, 648,640.69 and 255,163.86

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Solution

The fourth proportional to 470,023.76, 648,640.69 and 255,163.86 is: 352,130.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    470,023.76 : 648,640.69 = 255,163.86 : x
  2. Step 2: Convert to fraction form
    470,023.76/648,640.69 = 255,163.86/x
  3. Step 3: Cross multiply
    470,023.76x = 648,640.69 × 255,163.86
  4. Step 4: Simplify right side
    470,023.76x = 165,509,661,575.55
  5. Step 5: Solve for x
    x = 165,509,661,575.55/470,023.76
  6. Step 6: Final answer
    x = 352,130.41

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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.