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Finding the Fourth Proportional to 279,488.41, 418,621.60 and 216,141.95

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Solution

The fourth proportional to 279,488.41, 418,621.60 and 216,141.95 is: 323,740.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,488.41 : 418,621.60 = 216,141.95 : x
  2. Step 2: Convert to fraction form
    279,488.41/418,621.60 = 216,141.95/x
  3. Step 3: Cross multiply
    279,488.41x = 418,621.60 × 216,141.95
  4. Step 4: Simplify right side
    279,488.41x = 90,481,690,252.85
  5. Step 5: Solve for x
    x = 90,481,690,252.85/279,488.41
  6. Step 6: Final answer
    x = 323,740.41

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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.