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Finding the Fourth Proportional to 479.89, 719.43 and 248.68

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Solution

The fourth proportional to 479.89, 719.43 and 248.68 is: 372.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    479.89 : 719.43 = 248.68 : x
  2. Step 2: Convert to fraction form
    479.89/719.43 = 248.68/x
  3. Step 3: Cross multiply
    479.89x = 719.43 × 248.68
  4. Step 4: Simplify right side
    479.89x = 178,907.85
  5. Step 5: Solve for x
    x = 178,907.85/479.89
  6. Step 6: Final answer
    x = 372.81

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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.