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Finding the Fourth Proportional to 425,525.81, 638,379.43 and 212,408.33

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Solution

The fourth proportional to 425,525.81, 638,379.43 and 212,408.33 is: 318,657.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,525.81 : 638,379.43 = 212,408.33 : x
  2. Step 2: Convert to fraction form
    425,525.81/638,379.43 = 212,408.33/x
  3. Step 3: Cross multiply
    425,525.81x = 638,379.43 × 212,408.33
  4. Step 4: Simplify right side
    425,525.81x = 135,597,104,909.73
  5. Step 5: Solve for x
    x = 135,597,104,909.73/425,525.81
  6. Step 6: Final answer
    x = 318,657.77

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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.