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Finding the Fourth Proportional to 722.63, 997.29 and 423.79

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Solution

The fourth proportional to 722.63, 997.29 and 423.79 is: 584.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    722.63 : 997.29 = 423.79 : x
  2. Step 2: Convert to fraction form
    722.63/997.29 = 423.79/x
  3. Step 3: Cross multiply
    722.63x = 997.29 × 423.79
  4. Step 4: Simplify right side
    722.63x = 422,639.04
  5. Step 5: Solve for x
    x = 422,639.04/722.63
  6. Step 6: Final answer
    x = 584.86

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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.