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Finding the Fourth Proportional to 609.24, 840.82 and 422.68

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Solution

The fourth proportional to 609.24, 840.82 and 422.68 is: 583.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    609.24 : 840.82 = 422.68 : x
  2. Step 2: Convert to fraction form
    609.24/840.82 = 422.68/x
  3. Step 3: Cross multiply
    609.24x = 840.82 × 422.68
  4. Step 4: Simplify right side
    609.24x = 355,397.80
  5. Step 5: Solve for x
    x = 355,397.80/609.24
  6. Step 6: Final answer
    x = 583.35

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.