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Finding the Fourth Proportional to 442.08, 662.88 and 288

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Solution

The fourth proportional to 442.08, 662.88 and 288 is: 431.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    442.08 : 662.88 = 288 : x
  2. Step 2: Convert to fraction form
    442.08/662.88 = 288/x
  3. Step 3: Cross multiply
    442.08x = 662.88 × 288
  4. Step 4: Simplify right side
    442.08x = 190,909.44
  5. Step 5: Solve for x
    x = 190,909.44/442.08
  6. Step 6: Final answer
    x = 431.84

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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.