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Finding the Fourth Proportional to 394,788.76, 591,920.10 and 217,379.32

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Solution

The fourth proportional to 394,788.76, 591,920.10 and 217,379.32 is: 325,924.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,788.76 : 591,920.10 = 217,379.32 : x
  2. Step 2: Convert to fraction form
    394,788.76/591,920.10 = 217,379.32/x
  3. Step 3: Cross multiply
    394,788.76x = 591,920.10 × 217,379.32
  4. Step 4: Simplify right side
    394,788.76x = 128,671,188,832.33
  5. Step 5: Solve for x
    x = 128,671,188,832.33/394,788.76
  6. Step 6: Final answer
    x = 325,924.14

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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.