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Finding the Fourth Proportional to 279,908.40, 419,862.60 and 92,919.90

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Solution

The fourth proportional to 279,908.40, 419,862.60 and 92,919.90 is: 139,379.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,908.40 : 419,862.60 = 92,919.90 : x
  2. Step 2: Convert to fraction form
    279,908.40/419,862.60 = 92,919.90/x
  3. Step 3: Cross multiply
    279,908.40x = 419,862.60 × 92,919.90
  4. Step 4: Simplify right side
    279,908.40x = 39,013,590,805.74
  5. Step 5: Solve for x
    x = 39,013,590,805.74/279,908.40
  6. Step 6: Final answer
    x = 139,379.85

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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.