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Finding the Fourth Proportional to 279,972.70, 419,958.94 and 69,610.64

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Solution

The fourth proportional to 279,972.70, 419,958.94 and 69,610.64 is: 104,415.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,972.70 : 419,958.94 = 69,610.64 : x
  2. Step 2: Convert to fraction form
    279,972.70/419,958.94 = 69,610.64/x
  3. Step 3: Cross multiply
    279,972.70x = 419,958.94 × 69,610.64
  4. Step 4: Simplify right side
    279,972.70x = 29,233,610,587.12
  5. Step 5: Solve for x
    x = 29,233,610,587.12/279,972.70
  6. Step 6: Final answer
    x = 104,415.93

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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.