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Finding the Fourth Proportional to 353,672.55, 488,105.34 and 309,661.91

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Solution

The fourth proportional to 353,672.55, 488,105.34 and 309,661.91 is: 427,366.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,672.55 : 488,105.34 = 309,661.91 : x
  2. Step 2: Convert to fraction form
    353,672.55/488,105.34 = 309,661.91/x
  3. Step 3: Cross multiply
    353,672.55x = 488,105.34 × 309,661.91
  4. Step 4: Simplify right side
    353,672.55x = 151,147,629,425.07
  5. Step 5: Solve for x
    x = 151,147,629,425.07/353,672.55
  6. Step 6: Final answer
    x = 427,366.02

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.