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Finding the Fourth Proportional to 606.30, 909.21 and 281.43

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Solution

The fourth proportional to 606.30, 909.21 and 281.43 is: 422.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    606.30 : 909.21 = 281.43 : x
  2. Step 2: Convert to fraction form
    606.30/909.21 = 281.43/x
  3. Step 3: Cross multiply
    606.30x = 909.21 × 281.43
  4. Step 4: Simplify right side
    606.30x = 255,878.97
  5. Step 5: Solve for x
    x = 255,878.97/606.30
  6. Step 6: Final answer
    x = 422.03

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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.