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Finding the Fourth Proportional to 479.12, 718.80 and 219.18

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Solution

The fourth proportional to 479.12, 718.80 and 219.18 is: 328.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    479.12 : 718.80 = 219.18 : x
  2. Step 2: Convert to fraction form
    479.12/718.80 = 219.18/x
  3. Step 3: Cross multiply
    479.12x = 718.80 × 219.18
  4. Step 4: Simplify right side
    479.12x = 157,546.58
  5. Step 5: Solve for x
    x = 157,546.58/479.12
  6. Step 6: Final answer
    x = 328.82

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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.