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Finding the Fourth Proportional to 604.88, 905.69 and 315.71

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Solution

The fourth proportional to 604.88, 905.69 and 315.71 is: 472.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    604.88 : 905.69 = 315.71 : x
  2. Step 2: Convert to fraction form
    604.88/905.69 = 315.71/x
  3. Step 3: Cross multiply
    604.88x = 905.69 × 315.71
  4. Step 4: Simplify right side
    604.88x = 285,935.39
  5. Step 5: Solve for x
    x = 285,935.39/604.88
  6. Step 6: Final answer
    x = 472.71

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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.