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Finding the Fourth Proportional to 604.62, 908.75 and 399.89

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Solution

The fourth proportional to 604.62, 908.75 and 399.89 is: 601.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    604.62 : 908.75 = 399.89 : x
  2. Step 2: Convert to fraction form
    604.62/908.75 = 399.89/x
  3. Step 3: Cross multiply
    604.62x = 908.75 × 399.89
  4. Step 4: Simplify right side
    604.62x = 363,400.04
  5. Step 5: Solve for x
    x = 363,400.04/604.62
  6. Step 6: Final answer
    x = 601.04

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.