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Finding the Fourth Proportional to 420,791.70, 631,269.87 and 154,554.22

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Solution

The fourth proportional to 420,791.70, 631,269.87 and 154,554.22 is: 231,861.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,791.70 : 631,269.87 = 154,554.22 : x
  2. Step 2: Convert to fraction form
    420,791.70/631,269.87 = 154,554.22/x
  3. Step 3: Cross multiply
    420,791.70x = 631,269.87 × 154,554.22
  4. Step 4: Simplify right side
    420,791.70x = 97,565,418,438.23
  5. Step 5: Solve for x
    x = 97,565,418,438.23/420,791.70
  6. Step 6: Final answer
    x = 231,861.56

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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.