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Finding the Fourth Proportional to 353,081.70, 529,455.69 and 128,285.37

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Solution

The fourth proportional to 353,081.70, 529,455.69 and 128,285.37 is: 192,367.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,081.70 : 529,455.69 = 128,285.37 : x
  2. Step 2: Convert to fraction form
    353,081.70/529,455.69 = 128,285.37/x
  3. Step 3: Cross multiply
    353,081.70x = 529,455.69 × 128,285.37
  4. Step 4: Simplify right side
    353,081.70x = 67,921,419,090.26
  5. Step 5: Solve for x
    x = 67,921,419,090.26/353,081.70
  6. Step 6: Final answer
    x = 192,367.43

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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.