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Finding the Fourth Proportional to 352,908.72, 529,230.60 and 128,213.64

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Solution

The fourth proportional to 352,908.72, 529,230.60 and 128,213.64 is: 192,272.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    352,908.72 : 529,230.60 = 128,213.64 : x
  2. Step 2: Convert to fraction form
    352,908.72/529,230.60 = 128,213.64/x
  3. Step 3: Cross multiply
    352,908.72x = 529,230.60 × 128,213.64
  4. Step 4: Simplify right side
    352,908.72x = 67,854,581,625.38
  5. Step 5: Solve for x
    x = 67,854,581,625.38/352,908.72
  6. Step 6: Final answer
    x = 192,272.33

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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.