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Finding the Fourth Proportional to 664,672.60, 995,696.70 and 397,639.90

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Solution

The fourth proportional to 664,672.60, 995,696.70 and 397,639.90 is: 595,674.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,672.60 : 995,696.70 = 397,639.90 : x
  2. Step 2: Convert to fraction form
    664,672.60/995,696.70 = 397,639.90/x
  3. Step 3: Cross multiply
    664,672.60x = 995,696.70 × 397,639.90
  4. Step 4: Simplify right side
    664,672.60x = 395,928,736,218.33
  5. Step 5: Solve for x
    x = 395,928,736,218.33/664,672.60
  6. Step 6: Final answer
    x = 595,674.83

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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.