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Finding the Fourth Proportional to 279,216.54, 418,819.40 and 79,538.22

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Solution

The fourth proportional to 279,216.54, 418,819.40 and 79,538.22 is: 119,305.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,216.54 : 418,819.40 = 79,538.22 : x
  2. Step 2: Convert to fraction form
    279,216.54/418,819.40 = 79,538.22/x
  3. Step 3: Cross multiply
    279,216.54x = 418,819.40 × 79,538.22
  4. Step 4: Simplify right side
    279,216.54x = 33,312,149,577.47
  5. Step 5: Solve for x
    x = 33,312,149,577.47/279,216.54
  6. Step 6: Final answer
    x = 119,305.79

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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.