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Finding the Fourth Proportional to 352,138.60, 528,207.90 and 331,402.60

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Solution

The fourth proportional to 352,138.60, 528,207.90 and 331,402.60 is: 497,103.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    352,138.60 : 528,207.90 = 331,402.60 : x
  2. Step 2: Convert to fraction form
    352,138.60/528,207.90 = 331,402.60/x
  3. Step 3: Cross multiply
    352,138.60x = 528,207.90 × 331,402.60
  4. Step 4: Simplify right side
    352,138.60x = 175,049,471,400.54
  5. Step 5: Solve for x
    x = 175,049,471,400.54/352,138.60
  6. Step 6: Final answer
    x = 497,103.90

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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.