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Finding the Fourth Proportional to 279,363.36, 418,975.60 and 79,685.46

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Solution

The fourth proportional to 279,363.36, 418,975.60 and 79,685.46 is: 119,508.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,363.36 : 418,975.60 = 79,685.46 : x
  2. Step 2: Convert to fraction form
    279,363.36/418,975.60 = 79,685.46/x
  3. Step 3: Cross multiply
    279,363.36x = 418,975.60 × 79,685.46
  4. Step 4: Simplify right side
    279,363.36x = 33,386,263,414.78
  5. Step 5: Solve for x
    x = 33,386,263,414.78/279,363.36
  6. Step 6: Final answer
    x = 119,508.38

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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.