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Finding the Fourth Proportional to 564.21, 845.81 and 217.32

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Solution

The fourth proportional to 564.21, 845.81 and 217.32 is: 325.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    564.21 : 845.81 = 217.32 : x
  2. Step 2: Convert to fraction form
    564.21/845.81 = 217.32/x
  3. Step 3: Cross multiply
    564.21x = 845.81 × 217.32
  4. Step 4: Simplify right side
    564.21x = 183,813.51
  5. Step 5: Solve for x
    x = 183,813.51/564.21
  6. Step 6: Final answer
    x = 325.79

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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.