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Finding the Fourth Proportional to 479.85, 719.85 and 205.94

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Solution

The fourth proportional to 479.85, 719.85 and 205.94 is: 308.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    479.85 : 719.85 = 205.94 : x
  2. Step 2: Convert to fraction form
    479.85/719.85 = 205.94/x
  3. Step 3: Cross multiply
    479.85x = 719.85 × 205.94
  4. Step 4: Simplify right side
    479.85x = 148,244.88
  5. Step 5: Solve for x
    x = 148,244.88/479.85
  6. Step 6: Final answer
    x = 308.94

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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.