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Finding the Fourth Proportional to 515,381.45, 711,202.40 and 285,936.29

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Solution

The fourth proportional to 515,381.45, 711,202.40 and 285,936.29 is: 394,578.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,381.45 : 711,202.40 = 285,936.29 : x
  2. Step 2: Convert to fraction form
    515,381.45/711,202.40 = 285,936.29/x
  3. Step 3: Cross multiply
    515,381.45x = 711,202.40 × 285,936.29
  4. Step 4: Simplify right side
    515,381.45x = 203,358,570,709.40
  5. Step 5: Solve for x
    x = 203,358,570,709.40/515,381.45
  6. Step 6: Final answer
    x = 394,578.76

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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.