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Finding the Fourth Proportional to 664,978.60, 997,613.70 and 328,180.60

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Solution

The fourth proportional to 664,978.60, 997,613.70 and 328,180.60 is: 492,342.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,978.60 : 997,613.70 = 328,180.60 : x
  2. Step 2: Convert to fraction form
    664,978.60/997,613.70 = 328,180.60/x
  3. Step 3: Cross multiply
    664,978.60x = 997,613.70 × 328,180.60
  4. Step 4: Simplify right side
    664,978.60x = 327,397,462,634.22
  5. Step 5: Solve for x
    x = 327,397,462,634.22/664,978.60
  6. Step 6: Final answer
    x = 492,342.86

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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.