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Finding the Fourth Proportional to 664,485.30, 996,825.76 and 215,056.80

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Solution

The fourth proportional to 664,485.30, 996,825.76 and 215,056.80 is: 322,616.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,485.30 : 996,825.76 = 215,056.80 : x
  2. Step 2: Convert to fraction form
    664,485.30/996,825.76 = 215,056.80/x
  3. Step 3: Cross multiply
    664,485.30x = 996,825.76 × 215,056.80
  4. Step 4: Simplify right side
    664,485.30x = 214,374,158,103.17
  5. Step 5: Solve for x
    x = 214,374,158,103.17/664,485.30
  6. Step 6: Final answer
    x = 322,616.86

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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.