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Finding the Fourth Proportional to 664,346.20, 996,665.10 and 214,990.60

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Solution

The fourth proportional to 664,346.20, 996,665.10 and 214,990.60 is: 322,533.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,346.20 : 996,665.10 = 214,990.60 : x
  2. Step 2: Convert to fraction form
    664,346.20/996,665.10 = 214,990.60/x
  3. Step 3: Cross multiply
    664,346.20x = 996,665.10 × 214,990.60
  4. Step 4: Simplify right side
    664,346.20x = 214,273,627,848.06
  5. Step 5: Solve for x
    x = 214,273,627,848.06/664,346.20
  6. Step 6: Final answer
    x = 322,533.08

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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.