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Finding the Fourth Proportional to 664,298.64, 996,606.15 and 215,019.60

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Solution

The fourth proportional to 664,298.64, 996,606.15 and 215,019.60 is: 322,580.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,298.64 : 996,606.15 = 215,019.60 : x
  2. Step 2: Convert to fraction form
    664,298.64/996,606.15 = 215,019.60/x
  3. Step 3: Cross multiply
    664,298.64x = 996,606.15 × 215,019.60
  4. Step 4: Simplify right side
    664,298.64x = 214,289,855,730.54
  5. Step 5: Solve for x
    x = 214,289,855,730.54/664,298.64
  6. Step 6: Final answer
    x = 322,580.60

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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.