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Finding the Fourth Proportional to 338,647.96, 507,906.28 and 321,788.60

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Solution

The fourth proportional to 338,647.96, 507,906.28 and 321,788.60 is: 482,620.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    338,647.96 : 507,906.28 = 321,788.60 : x
  2. Step 2: Convert to fraction form
    338,647.96/507,906.28 = 321,788.60/x
  3. Step 3: Cross multiply
    338,647.96x = 507,906.28 × 321,788.60
  4. Step 4: Simplify right side
    338,647.96x = 163,438,450,772.41
  5. Step 5: Solve for x
    x = 163,438,450,772.41/338,647.96
  6. Step 6: Final answer
    x = 482,620.51

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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.