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Finding the Fourth Proportional to 664,671.60, 995,695.20 and 397,638.90

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Solution

The fourth proportional to 664,671.60, 995,695.20 and 397,638.90 is: 595,673.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,671.60 : 995,695.20 = 397,638.90 : x
  2. Step 2: Convert to fraction form
    664,671.60/995,695.20 = 397,638.90/x
  3. Step 3: Cross multiply
    664,671.60x = 995,695.20 × 397,638.90
  4. Step 4: Simplify right side
    664,671.60x = 395,927,144,063.28
  5. Step 5: Solve for x
    x = 395,927,144,063.28/664,671.60
  6. Step 6: Final answer
    x = 595,673.33

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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.