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Finding the Fourth Proportional to 338,246.72, 507,268.84 and 212,078.68

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Solution

The fourth proportional to 338,246.72, 507,268.84 and 212,078.68 is: 318,054.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    338,246.72 : 507,268.84 = 212,078.68 : x
  2. Step 2: Convert to fraction form
    338,246.72/507,268.84 = 212,078.68/x
  3. Step 3: Cross multiply
    338,246.72x = 507,268.84 × 212,078.68
  4. Step 4: Simplify right side
    338,246.72x = 107,580,905,992.33
  5. Step 5: Solve for x
    x = 107,580,905,992.33/338,246.72
  6. Step 6: Final answer
    x = 318,054.54

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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.