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Finding the Fourth Proportional to 606.11, 909.61 and 281.70

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Solution

The fourth proportional to 606.11, 909.61 and 281.70 is: 422.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    606.11 : 909.61 = 281.70 : x
  2. Step 2: Convert to fraction form
    606.11/909.61 = 281.70/x
  3. Step 3: Cross multiply
    606.11x = 909.61 × 281.70
  4. Step 4: Simplify right side
    606.11x = 256,237.14
  5. Step 5: Solve for x
    x = 256,237.14/606.11
  6. Step 6: Final answer
    x = 422.76

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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.