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Finding the Fourth Proportional to 289,891.20, 434,836.80 and 195,412.80

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Solution

The fourth proportional to 289,891.20, 434,836.80 and 195,412.80 is: 293,119.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,891.20 : 434,836.80 = 195,412.80 : x
  2. Step 2: Convert to fraction form
    289,891.20/434,836.80 = 195,412.80/x
  3. Step 3: Cross multiply
    289,891.20x = 434,836.80 × 195,412.80
  4. Step 4: Simplify right side
    289,891.20x = 84,972,676,631.04
  5. Step 5: Solve for x
    x = 84,972,676,631.04/289,891.20
  6. Step 6: Final answer
    x = 293,119.20

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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.