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Finding the Fourth Proportional to 442.18, 662.42 and 210.76

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Solution

The fourth proportional to 442.18, 662.42 and 210.76 is: 315.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    442.18 : 662.42 = 210.76 : x
  2. Step 2: Convert to fraction form
    442.18/662.42 = 210.76/x
  3. Step 3: Cross multiply
    442.18x = 662.42 × 210.76
  4. Step 4: Simplify right side
    442.18x = 139,608.73
  5. Step 5: Solve for x
    x = 139,608.73/442.18
  6. Step 6: Final answer
    x = 315.73

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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.