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Finding the Fourth Proportional to 279,424.28, 419,136.56 and 92,435.78

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Solution

The fourth proportional to 279,424.28, 419,136.56 and 92,435.78 is: 138,653.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,424.28 : 419,136.56 = 92,435.78 : x
  2. Step 2: Convert to fraction form
    279,424.28/419,136.56 = 92,435.78/x
  3. Step 3: Cross multiply
    279,424.28x = 419,136.56 × 92,435.78
  4. Step 4: Simplify right side
    279,424.28x = 38,743,214,850.12
  5. Step 5: Solve for x
    x = 38,743,214,850.12/279,424.28
  6. Step 6: Final answer
    x = 138,653.72

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1.5x scale

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.