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Finding the Fourth Proportional to 651.16, 976.44 and 218.20

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Solution

The fourth proportional to 651.16, 976.44 and 218.20 is: 327.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    651.16 : 976.44 = 218.20 : x
  2. Step 2: Convert to fraction form
    651.16/976.44 = 218.20/x
  3. Step 3: Cross multiply
    651.16x = 976.44 × 218.20
  4. Step 4: Simplify right side
    651.16x = 213,059.21
  5. Step 5: Solve for x
    x = 213,059.21/651.16
  6. Step 6: Final answer
    x = 327.20

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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.