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Finding the Fourth Proportional to 702,896.78, 969,998.87 and 392,799.36

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Solution

The fourth proportional to 702,896.78, 969,998.87 and 392,799.36 is: 542,063.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    702,896.78 : 969,998.87 = 392,799.36 : x
  2. Step 2: Convert to fraction form
    702,896.78/969,998.87 = 392,799.36/x
  3. Step 3: Cross multiply
    702,896.78x = 969,998.87 × 392,799.36
  4. Step 4: Simplify right side
    702,896.78x = 381,014,928,522.73
  5. Step 5: Solve for x
    x = 381,014,928,522.73/702,896.78
  6. Step 6: Final answer
    x = 542,063.85

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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.