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Finding the Fourth Proportional to 664,490.40, 996,894.24 and 215,212.32

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Solution

The fourth proportional to 664,490.40, 996,894.24 and 215,212.32 is: 322,869.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,490.40 : 996,894.24 = 215,212.32 : x
  2. Step 2: Convert to fraction form
    664,490.40/996,894.24 = 215,212.32/x
  3. Step 3: Cross multiply
    664,490.40x = 996,894.24 × 215,212.32
  4. Step 4: Simplify right side
    664,490.40x = 214,543,922,185.04
  5. Step 5: Solve for x
    x = 214,543,922,185.04/664,490.40
  6. Step 6: Final answer
    x = 322,869.86

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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.