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Finding the Fourth Proportional to 479.42, 718.67 and 247.79

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Solution

The fourth proportional to 479.42, 718.67 and 247.79 is: 371.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    479.42 : 718.67 = 247.79 : x
  2. Step 2: Convert to fraction form
    479.42/718.67 = 247.79/x
  3. Step 3: Cross multiply
    479.42x = 718.67 × 247.79
  4. Step 4: Simplify right side
    479.42x = 178,074.41
  5. Step 5: Solve for x
    x = 178,074.41/479.42
  6. Step 6: Final answer
    x = 371.44

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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.