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Finding the Fourth Proportional to 664,366.60, 996,420.30 and 214,978.60

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Solution

The fourth proportional to 664,366.60, 996,420.30 and 214,978.60 is: 322,425.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,366.60 : 996,420.30 = 214,978.60 : x
  2. Step 2: Convert to fraction form
    664,366.60/996,420.30 = 214,978.60/x
  3. Step 3: Cross multiply
    664,366.60x = 996,420.30 × 214,978.60
  4. Step 4: Simplify right side
    664,366.60x = 214,209,041,105.58
  5. Step 5: Solve for x
    x = 214,209,041,105.58/664,366.60
  6. Step 6: Final answer
    x = 322,425.96

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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.