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Finding the Fourth Proportional to 659,189.12, 987,992.60 and 339,491.43

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Solution

The fourth proportional to 659,189.12, 987,992.60 and 339,491.43 is: 508,829.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,189.12 : 987,992.60 = 339,491.43 : x
  2. Step 2: Convert to fraction form
    659,189.12/987,992.60 = 339,491.43/x
  3. Step 3: Cross multiply
    659,189.12x = 987,992.60 × 339,491.43
  4. Step 4: Simplify right side
    659,189.12x = 335,415,018,905.96
  5. Step 5: Solve for x
    x = 335,415,018,905.96/659,189.12
  6. Step 6: Final answer
    x = 508,829.73

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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.