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Finding the Fourth Proportional to 279,436.80, 419,328 and 113,226.24

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Solution

The fourth proportional to 279,436.80, 419,328 and 113,226.24 is: 169,909.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,436.80 : 419,328 = 113,226.24 : x
  2. Step 2: Convert to fraction form
    279,436.80/419,328 = 113,226.24/x
  3. Step 3: Cross multiply
    279,436.80x = 419,328 × 113,226.24
  4. Step 4: Simplify right side
    279,436.80x = 47,478,932,766.72
  5. Step 5: Solve for x
    x = 47,478,932,766.72/279,436.80
  6. Step 6: Final answer
    x = 169,909.38

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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.