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Finding the Fourth Proportional to 253,388.24, 379,975.44 and 75,920.48

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Solution

The fourth proportional to 253,388.24, 379,975.44 and 75,920.48 is: 113,848.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,388.24 : 379,975.44 = 75,920.48 : x
  2. Step 2: Convert to fraction form
    253,388.24/379,975.44 = 75,920.48/x
  3. Step 3: Cross multiply
    253,388.24x = 379,975.44 × 75,920.48
  4. Step 4: Simplify right side
    253,388.24x = 28,847,917,793.01
  5. Step 5: Solve for x
    x = 28,847,917,793.01/253,388.24
  6. Step 6: Final answer
    x = 113,848.68

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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.