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Finding the Fourth Proportional to 279,326.76, 418,994.05 and 79,647.23

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Solution

The fourth proportional to 279,326.76, 418,994.05 and 79,647.23 is: 119,471.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,326.76 : 418,994.05 = 79,647.23 : x
  2. Step 2: Convert to fraction form
    279,326.76/418,994.05 = 79,647.23/x
  3. Step 3: Cross multiply
    279,326.76x = 418,994.05 × 79,647.23
  4. Step 4: Simplify right side
    279,326.76x = 33,371,715,468.98
  5. Step 5: Solve for x
    x = 33,371,715,468.98/279,326.76
  6. Step 6: Final answer
    x = 119,471.96

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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.