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Finding the Fourth Proportional to 479.45, 719.08 and 205.67

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Solution

The fourth proportional to 479.45, 719.08 and 205.67 is: 308.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    479.45 : 719.08 = 205.67 : x
  2. Step 2: Convert to fraction form
    479.45/719.08 = 205.67/x
  3. Step 3: Cross multiply
    479.45x = 719.08 × 205.67
  4. Step 4: Simplify right side
    479.45x = 147,894.47
  5. Step 5: Solve for x
    x = 147,894.47/479.45
  6. Step 6: Final answer
    x = 308.47

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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.