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Finding the Fourth Proportional to 279,479.57, 418,694.47 and 216,843.89

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Solution

The fourth proportional to 279,479.57, 418,694.47 and 216,843.89 is: 324,858.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,479.57 : 418,694.47 = 216,843.89 : x
  2. Step 2: Convert to fraction form
    279,479.57/418,694.47 = 216,843.89/x
  3. Step 3: Cross multiply
    279,479.57x = 418,694.47 × 216,843.89
  4. Step 4: Simplify right side
    279,479.57x = 90,791,334,960.71
  5. Step 5: Solve for x
    x = 90,791,334,960.71/279,479.57
  6. Step 6: Final answer
    x = 324,858.58

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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.