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Finding the Fourth Proportional to 253,115.55, 379,679.40 and 75,628.35

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Solution

The fourth proportional to 253,115.55, 379,679.40 and 75,628.35 is: 113,444.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,115.55 : 379,679.40 = 75,628.35 : x
  2. Step 2: Convert to fraction form
    253,115.55/379,679.40 = 75,628.35/x
  3. Step 3: Cross multiply
    253,115.55x = 379,679.40 × 75,628.35
  4. Step 4: Simplify right side
    253,115.55x = 28,714,526,550.99
  5. Step 5: Solve for x
    x = 28,714,526,550.99/253,115.55
  6. Step 6: Final answer
    x = 113,444.34

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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.