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Finding the Fourth Proportional to 591,379.88, 816,104.56 and 319,447.78

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Solution

The fourth proportional to 591,379.88, 816,104.56 and 319,447.78 is: 440,838.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    591,379.88 : 816,104.56 = 319,447.78 : x
  2. Step 2: Convert to fraction form
    591,379.88/816,104.56 = 319,447.78/x
  3. Step 3: Cross multiply
    591,379.88x = 816,104.56 × 319,447.78
  4. Step 4: Simplify right side
    591,379.88x = 260,702,789,939.88
  5. Step 5: Solve for x
    x = 260,702,789,939.88/591,379.88
  6. Step 6: Final answer
    x = 440,838.11

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.