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Finding the Fourth Proportional to 436,721.80, 655,428.30 and 170,609.80

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Solution

The fourth proportional to 436,721.80, 655,428.30 and 170,609.80 is: 256,049.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    436,721.80 : 655,428.30 = 170,609.80 : x
  2. Step 2: Convert to fraction form
    436,721.80/655,428.30 = 170,609.80/x
  3. Step 3: Cross multiply
    436,721.80x = 655,428.30 × 170,609.80
  4. Step 4: Simplify right side
    436,721.80x = 111,822,491,177.34
  5. Step 5: Solve for x
    x = 111,822,491,177.34/436,721.80
  6. Step 6: Final answer
    x = 256,049.71

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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.