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Finding the Fourth Proportional to 722.82, 997.44 and 428.01

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Solution

The fourth proportional to 722.82, 997.44 and 428.01 is: 590.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    722.82 : 997.44 = 428.01 : x
  2. Step 2: Convert to fraction form
    722.82/997.44 = 428.01/x
  3. Step 3: Cross multiply
    722.82x = 997.44 × 428.01
  4. Step 4: Simplify right side
    722.82x = 426,914.29
  5. Step 5: Solve for x
    x = 426,914.29/722.82
  6. Step 6: Final answer
    x = 590.62

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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.