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Finding the Fourth Proportional to 425,445.31, 638,193.94 and 137,286.19

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Solution

The fourth proportional to 425,445.31, 638,193.94 and 137,286.19 is: 205,937.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,445.31 : 638,193.94 = 137,286.19 : x
  2. Step 2: Convert to fraction form
    425,445.31/638,193.94 = 137,286.19/x
  3. Step 3: Cross multiply
    425,445.31x = 638,193.94 × 137,286.19
  4. Step 4: Simplify right side
    425,445.31x = 87,615,214,958.22
  5. Step 5: Solve for x
    x = 87,615,214,958.22/425,445.31
  6. Step 6: Final answer
    x = 205,937.67

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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.