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Finding the Fourth Proportional to 604.98, 834.99 and 428.79

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Solution

The fourth proportional to 604.98, 834.99 and 428.79 is: 591.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    604.98 : 834.99 = 428.79 : x
  2. Step 2: Convert to fraction form
    604.98/834.99 = 428.79/x
  3. Step 3: Cross multiply
    604.98x = 834.99 × 428.79
  4. Step 4: Simplify right side
    604.98x = 358,035.36
  5. Step 5: Solve for x
    x = 358,035.36/604.98
  6. Step 6: Final answer
    x = 591.81

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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.