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Finding the Fourth Proportional to 431,300.80, 646,864.80 and 206,660.80

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Solution

The fourth proportional to 431,300.80, 646,864.80 and 206,660.80 is: 309,949.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,300.80 : 646,864.80 = 206,660.80 : x
  2. Step 2: Convert to fraction form
    431,300.80/646,864.80 = 206,660.80/x
  3. Step 3: Cross multiply
    431,300.80x = 646,864.80 × 206,660.80
  4. Step 4: Simplify right side
    431,300.80x = 133,681,597,059.84
  5. Step 5: Solve for x
    x = 133,681,597,059.84/431,300.80
  6. Step 6: Final answer
    x = 309,949.80

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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.