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Finding the Fourth Proportional to 561,819.44, 775,120.90 and 319,930.52

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Solution

The fourth proportional to 561,819.44, 775,120.90 and 319,930.52 is: 441,395.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,819.44 : 775,120.90 = 319,930.52 : x
  2. Step 2: Convert to fraction form
    561,819.44/775,120.90 = 319,930.52/x
  3. Step 3: Cross multiply
    561,819.44x = 775,120.90 × 319,930.52
  4. Step 4: Simplify right side
    561,819.44x = 247,984,832,599.87
  5. Step 5: Solve for x
    x = 247,984,832,599.87/561,819.44
  6. Step 6: Final answer
    x = 441,395.96

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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.