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Finding the Fourth Proportional to 520,550.44, 780,300.78 and 395,629

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Solution

The fourth proportional to 520,550.44, 780,300.78 and 395,629 is: 593,044.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,550.44 : 780,300.78 = 395,629 : x
  2. Step 2: Convert to fraction form
    520,550.44/780,300.78 = 395,629/x
  3. Step 3: Cross multiply
    520,550.44x = 780,300.78 × 395,629
  4. Step 4: Simplify right side
    520,550.44x = 308,709,617,290.62
  5. Step 5: Solve for x
    x = 308,709,617,290.62/520,550.44
  6. Step 6: Final answer
    x = 593,044.58

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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.