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Finding the Fourth Proportional to 659,861.36, 989,791.68 and 239,136.56

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Solution

The fourth proportional to 659,861.36, 989,791.68 and 239,136.56 is: 358,704.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,861.36 : 989,791.68 = 239,136.56 : x
  2. Step 2: Convert to fraction form
    659,861.36/989,791.68 = 239,136.56/x
  3. Step 3: Cross multiply
    659,861.36x = 989,791.68 × 239,136.56
  4. Step 4: Simplify right side
    659,861.36x = 236,695,377,471.82
  5. Step 5: Solve for x
    x = 236,695,377,471.82/659,861.36
  6. Step 6: Final answer
    x = 358,704.71

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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.