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Finding the Fourth Proportional to 279,216.53, 418,819.39 and 79,538.21

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Solution

The fourth proportional to 279,216.53, 418,819.39 and 79,538.21 is: 119,305.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,216.53 : 418,819.39 = 79,538.21 : x
  2. Step 2: Convert to fraction form
    279,216.53/418,819.39 = 79,538.21/x
  3. Step 3: Cross multiply
    279,216.53x = 418,819.39 × 79,538.21
  4. Step 4: Simplify right side
    279,216.53x = 33,312,144,593.89
  5. Step 5: Solve for x
    x = 33,312,144,593.89/279,216.53
  6. Step 6: Final answer
    x = 119,305.78

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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.