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Finding the Fourth Proportional to 659,063.72, 987,916.78 and 259,542.56

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Solution

The fourth proportional to 659,063.72, 987,916.78 and 259,542.56 is: 389,046.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,063.72 : 987,916.78 = 259,542.56 : x
  2. Step 2: Convert to fraction form
    659,063.72/987,916.78 = 259,542.56/x
  3. Step 3: Cross multiply
    659,063.72x = 987,916.78 × 259,542.56
  4. Step 4: Simplify right side
    659,063.72x = 256,406,450,148.16
  5. Step 5: Solve for x
    x = 256,406,450,148.16/659,063.72
  6. Step 6: Final answer
    x = 389,046.53

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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.