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Finding the Fourth Proportional to 664,668.60, 995,690.70 and 397,635.90

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Solution

The fourth proportional to 664,668.60, 995,690.70 and 397,635.90 is: 595,668.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,668.60 : 995,690.70 = 397,635.90 : x
  2. Step 2: Convert to fraction form
    664,668.60/995,690.70 = 397,635.90/x
  3. Step 3: Cross multiply
    664,668.60x = 995,690.70 × 397,635.90
  4. Step 4: Simplify right side
    664,668.60x = 395,922,367,616.13
  5. Step 5: Solve for x
    x = 395,922,367,616.13/664,668.60
  6. Step 6: Final answer
    x = 595,668.83

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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.