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Finding the Fourth Proportional to 279,788.38, 419,682.57 and 69,426.32

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Solution

The fourth proportional to 279,788.38, 419,682.57 and 69,426.32 is: 104,139.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,788.38 : 419,682.57 = 69,426.32 : x
  2. Step 2: Convert to fraction form
    279,788.38/419,682.57 = 69,426.32/x
  3. Step 3: Cross multiply
    279,788.38x = 419,682.57 × 69,426.32
  4. Step 4: Simplify right side
    279,788.38x = 29,137,014,044.48
  5. Step 5: Solve for x
    x = 29,137,014,044.48/279,788.38
  6. Step 6: Final answer
    x = 104,139.47

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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.