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Finding the Fourth Proportional to 628.63, 942.98 and 218.30

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Solution

The fourth proportional to 628.63, 942.98 and 218.30 is: 327.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    628.63 : 942.98 = 218.30 : x
  2. Step 2: Convert to fraction form
    628.63/942.98 = 218.30/x
  3. Step 3: Cross multiply
    628.63x = 942.98 × 218.30
  4. Step 4: Simplify right side
    628.63x = 205,846.73
  5. Step 5: Solve for x
    x = 205,846.73/628.63
  6. Step 6: Final answer
    x = 327.45

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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.