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Finding the Fourth Proportional to 606.45, 910.15 and 422.65

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Solution

The fourth proportional to 606.45, 910.15 and 422.65 is: 634.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    606.45 : 910.15 = 422.65 : x
  2. Step 2: Convert to fraction form
    606.45/910.15 = 422.65/x
  3. Step 3: Cross multiply
    606.45x = 910.15 × 422.65
  4. Step 4: Simplify right side
    606.45x = 384,674.90
  5. Step 5: Solve for x
    x = 384,674.90/606.45
  6. Step 6: Final answer
    x = 634.31

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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.