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Finding the Fourth Proportional to 289,679.80, 434,519.70 and 252,815.80

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Solution

The fourth proportional to 289,679.80, 434,519.70 and 252,815.80 is: 379,223.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,679.80 : 434,519.70 = 252,815.80 : x
  2. Step 2: Convert to fraction form
    289,679.80/434,519.70 = 252,815.80/x
  3. Step 3: Cross multiply
    289,679.80x = 434,519.70 × 252,815.80
  4. Step 4: Simplify right side
    289,679.80x = 109,853,445,571.26
  5. Step 5: Solve for x
    x = 109,853,445,571.26/289,679.80
  6. Step 6: Final answer
    x = 379,223.70

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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.