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Finding the Fourth Proportional to 325,811.20, 488,803.20 and 115,427.20

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Solution

The fourth proportional to 325,811.20, 488,803.20 and 115,427.20 is: 173,171.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    325,811.20 : 488,803.20 = 115,427.20 : x
  2. Step 2: Convert to fraction form
    325,811.20/488,803.20 = 115,427.20/x
  3. Step 3: Cross multiply
    325,811.20x = 488,803.20 × 115,427.20
  4. Step 4: Simplify right side
    325,811.20x = 56,421,184,727.04
  5. Step 5: Solve for x
    x = 56,421,184,727.04/325,811.20
  6. Step 6: Final answer
    x = 173,171.41

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.