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Finding the Fourth Proportional to 561.96, 774.95 and 422.09

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Solution

The fourth proportional to 561.96, 774.95 and 422.09 is: 582.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    561.96 : 774.95 = 422.09 : x
  2. Step 2: Convert to fraction form
    561.96/774.95 = 422.09/x
  3. Step 3: Cross multiply
    561.96x = 774.95 × 422.09
  4. Step 4: Simplify right side
    561.96x = 327,095.57
  5. Step 5: Solve for x
    x = 327,095.57/561.96
  6. Step 6: Final answer
    x = 582.06

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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.