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Finding the Fourth Proportional to 439,353.33, 659,033.52 and 287,678.28

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Solution

The fourth proportional to 439,353.33, 659,033.52 and 287,678.28 is: 431,519.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,353.33 : 659,033.52 = 287,678.28 : x
  2. Step 2: Convert to fraction form
    439,353.33/659,033.52 = 287,678.28/x
  3. Step 3: Cross multiply
    439,353.33x = 659,033.52 × 287,678.28
  4. Step 4: Simplify right side
    439,353.33x = 189,589,629,495.95
  5. Step 5: Solve for x
    x = 189,589,629,495.95/439,353.33
  6. Step 6: Final answer
    x = 431,519.73

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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.