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Finding the Fourth Proportional to 431,021.47, 645,861.63 and 164,636.59

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Solution

The fourth proportional to 431,021.47, 645,861.63 and 164,636.59 is: 246,698.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,021.47 : 645,861.63 = 164,636.59 : x
  2. Step 2: Convert to fraction form
    431,021.47/645,861.63 = 164,636.59/x
  3. Step 3: Cross multiply
    431,021.47x = 645,861.63 × 164,636.59
  4. Step 4: Simplify right side
    431,021.47x = 106,332,456,375.04
  5. Step 5: Solve for x
    x = 106,332,456,375.04/431,021.47
  6. Step 6: Final answer
    x = 246,698.75

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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.