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Finding the Fourth Proportional to 651.82, 978.11 and 327.19

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Solution

The fourth proportional to 651.82, 978.11 and 327.19 is: 490.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    651.82 : 978.11 = 327.19 : x
  2. Step 2: Convert to fraction form
    651.82/978.11 = 327.19/x
  3. Step 3: Cross multiply
    651.82x = 978.11 × 327.19
  4. Step 4: Simplify right side
    651.82x = 320,027.81
  5. Step 5: Solve for x
    x = 320,027.81/651.82
  6. Step 6: Final answer
    x = 490.98

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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.