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Finding the Fourth Proportional to 479.08, 718.98 and 205.39

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Solution

The fourth proportional to 479.08, 718.98 and 205.39 is: 308.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    479.08 : 718.98 = 205.39 : x
  2. Step 2: Convert to fraction form
    479.08/718.98 = 205.39/x
  3. Step 3: Cross multiply
    479.08x = 718.98 × 205.39
  4. Step 4: Simplify right side
    479.08x = 147,671.30
  5. Step 5: Solve for x
    x = 147,671.30/479.08
  6. Step 6: Final answer
    x = 308.24

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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.