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Finding the Fourth Proportional to 289,791.94, 434,641.25 and 79,380.70

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Solution

The fourth proportional to 289,791.94, 434,641.25 and 79,380.70 is: 119,058.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,791.94 : 434,641.25 = 79,380.70 : x
  2. Step 2: Convert to fraction form
    289,791.94/434,641.25 = 79,380.70/x
  3. Step 3: Cross multiply
    289,791.94x = 434,641.25 × 79,380.70
  4. Step 4: Simplify right side
    289,791.94x = 34,502,126,673.88
  5. Step 5: Solve for x
    x = 34,502,126,673.88/289,791.94
  6. Step 6: Final answer
    x = 119,058.27

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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.