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Finding the Fourth Proportional to 354,078.70, 531,339.48 and 143,716.64

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Solution

The fourth proportional to 354,078.70, 531,339.48 and 143,716.64 is: 215,664.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,078.70 : 531,339.48 = 143,716.64 : x
  2. Step 2: Convert to fraction form
    354,078.70/531,339.48 = 143,716.64/x
  3. Step 3: Cross multiply
    354,078.70x = 531,339.48 × 143,716.64
  4. Step 4: Simplify right side
    354,078.70x = 76,362,322,108.25
  5. Step 5: Solve for x
    x = 76,362,322,108.25/354,078.70
  6. Step 6: Final answer
    x = 215,664.83

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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.