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Finding the Fourth Proportional to 479.67, 718.91 and 205.44

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Solution

The fourth proportional to 479.67, 718.91 and 205.44 is: 307.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    479.67 : 718.91 = 205.44 : x
  2. Step 2: Convert to fraction form
    479.67/718.91 = 205.44/x
  3. Step 3: Cross multiply
    479.67x = 718.91 × 205.44
  4. Step 4: Simplify right side
    479.67x = 147,692.87
  5. Step 5: Solve for x
    x = 147,692.87/479.67
  6. Step 6: Final answer
    x = 307.91

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.