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Finding the Fourth Proportional to 664,288.82, 996,591.41 and 215,009.77

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Solution

The fourth proportional to 664,288.82, 996,591.41 and 215,009.77 is: 322,565.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,288.82 : 996,591.41 = 215,009.77 : x
  2. Step 2: Convert to fraction form
    664,288.82/996,591.41 = 215,009.77/x
  3. Step 3: Cross multiply
    664,288.82x = 996,591.41 × 215,009.77
  4. Step 4: Simplify right side
    664,288.82x = 214,276,889,848.08
  5. Step 5: Solve for x
    x = 214,276,889,848.08/664,288.82
  6. Step 6: Final answer
    x = 322,565.85

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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.