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Finding the Fourth Proportional to 389.39, 584.09 and 337.95

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Solution

The fourth proportional to 389.39, 584.09 and 337.95 is: 506.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    389.39 : 584.09 = 337.95 : x
  2. Step 2: Convert to fraction form
    389.39/584.09 = 337.95/x
  3. Step 3: Cross multiply
    389.39x = 584.09 × 337.95
  4. Step 4: Simplify right side
    389.39x = 197,391.53
  5. Step 5: Solve for x
    x = 197,391.53/389.39
  6. Step 6: Final answer
    x = 506.93

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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.