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Finding the Fourth Proportional to 520,553.44, 780,305.28 and 395,632

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Solution

The fourth proportional to 520,553.44, 780,305.28 and 395,632 is: 593,049.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,553.44 : 780,305.28 = 395,632 : x
  2. Step 2: Convert to fraction form
    520,553.44/780,305.28 = 395,632/x
  3. Step 3: Cross multiply
    520,553.44x = 780,305.28 × 395,632
  4. Step 4: Simplify right side
    520,553.44x = 308,713,738,536.96
  5. Step 5: Solve for x
    x = 308,713,738,536.96/520,553.44
  6. Step 6: Final answer
    x = 593,049.08

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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.