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Finding the Fourth Proportional to 479.26, 717.37 and 392.39

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Solution

The fourth proportional to 479.26, 717.37 and 392.39 is: 587.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    479.26 : 717.37 = 392.39 : x
  2. Step 2: Convert to fraction form
    479.26/717.37 = 392.39/x
  3. Step 3: Cross multiply
    479.26x = 717.37 × 392.39
  4. Step 4: Simplify right side
    479.26x = 281,484.25
  5. Step 5: Solve for x
    x = 281,484.25/479.26
  6. Step 6: Final answer
    x = 587.33

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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.