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Finding the Fourth Proportional to 318,848.73, 439,978.66 and 196,321.65

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Solution

The fourth proportional to 318,848.73, 439,978.66 and 196,321.65 is: 270,903.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,848.73 : 439,978.66 = 196,321.65 : x
  2. Step 2: Convert to fraction form
    318,848.73/439,978.66 = 196,321.65/x
  3. Step 3: Cross multiply
    318,848.73x = 439,978.66 × 196,321.65
  4. Step 4: Simplify right side
    318,848.73x = 86,377,336,495.99
  5. Step 5: Solve for x
    x = 86,377,336,495.99/318,848.73
  6. Step 6: Final answer
    x = 270,903.81

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.