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Finding the Fourth Proportional to 288,007.80, 431,255.70 and 203,310.60

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Solution

The fourth proportional to 288,007.80, 431,255.70 and 203,310.60 is: 304,432.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    288,007.80 : 431,255.70 = 203,310.60 : x
  2. Step 2: Convert to fraction form
    288,007.80/431,255.70 = 203,310.60/x
  3. Step 3: Cross multiply
    288,007.80x = 431,255.70 × 203,310.60
  4. Step 4: Simplify right side
    288,007.80x = 87,678,855,120.42
  5. Step 5: Solve for x
    x = 87,678,855,120.42/288,007.80
  6. Step 6: Final answer
    x = 304,432.22

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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.