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Finding the Fourth Proportional to 620,224.87, 855,989.70 and 378,456.28

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Solution

The fourth proportional to 620,224.87, 855,989.70 and 378,456.28 is: 522,318.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,224.87 : 855,989.70 = 378,456.28 : x
  2. Step 2: Convert to fraction form
    620,224.87/855,989.70 = 378,456.28/x
  3. Step 3: Cross multiply
    620,224.87x = 855,989.70 × 378,456.28
  4. Step 4: Simplify right side
    620,224.87x = 323,954,677,580.32
  5. Step 5: Solve for x
    x = 323,954,677,580.32/620,224.87
  6. Step 6: Final answer
    x = 522,318.10

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.