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Finding the Fourth Proportional to 288,100.80, 431,600.40 and 154,936.80

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Solution

The fourth proportional to 288,100.80, 431,600.40 and 154,936.80 is: 232,108.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    288,100.80 : 431,600.40 = 154,936.80 : x
  2. Step 2: Convert to fraction form
    288,100.80/431,600.40 = 154,936.80/x
  3. Step 3: Cross multiply
    288,100.80x = 431,600.40 × 154,936.80
  4. Step 4: Simplify right side
    288,100.80x = 66,870,784,854.72
  5. Step 5: Solve for x
    x = 66,870,784,854.72/288,100.80
  6. Step 6: Final answer
    x = 232,108.99

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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.