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Finding the Fourth Proportional to 651.62, 976.81 and 218.47

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Solution

The fourth proportional to 651.62, 976.81 and 218.47 is: 327.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    651.62 : 976.81 = 218.47 : x
  2. Step 2: Convert to fraction form
    651.62/976.81 = 218.47/x
  3. Step 3: Cross multiply
    651.62x = 976.81 × 218.47
  4. Step 4: Simplify right side
    651.62x = 213,403.68
  5. Step 5: Solve for x
    x = 213,403.68/651.62
  6. Step 6: Final answer
    x = 327.50

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Similar ratio
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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.