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Finding the Fourth Proportional to 479.39, 719.09 and 263.39

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Solution

The fourth proportional to 479.39, 719.09 and 263.39 is: 395.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    479.39 : 719.09 = 263.39 : x
  2. Step 2: Convert to fraction form
    479.39/719.09 = 263.39/x
  3. Step 3: Cross multiply
    479.39x = 719.09 × 263.39
  4. Step 4: Simplify right side
    479.39x = 189,399.80
  5. Step 5: Solve for x
    x = 189,399.80/479.39
  6. Step 6: Final answer
    x = 395.09

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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.