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Finding the Fourth Proportional to 479.42, 719.18 and 205.53

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Solution

The fourth proportional to 479.42, 719.18 and 205.53 is: 308.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    479.42 : 719.18 = 205.53 : x
  2. Step 2: Convert to fraction form
    479.42/719.18 = 205.53/x
  3. Step 3: Cross multiply
    479.42x = 719.18 × 205.53
  4. Step 4: Simplify right side
    479.42x = 147,813.07
  5. Step 5: Solve for x
    x = 147,813.07/479.42
  6. Step 6: Final answer
    x = 308.32

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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.