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Finding the Fourth Proportional to 563.91, 845.90 and 217.25

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Solution

The fourth proportional to 563.91, 845.90 and 217.25 is: 325.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    563.91 : 845.90 = 217.25 : x
  2. Step 2: Convert to fraction form
    563.91/845.90 = 217.25/x
  3. Step 3: Cross multiply
    563.91x = 845.90 × 217.25
  4. Step 4: Simplify right side
    563.91x = 183,768.71
  5. Step 5: Solve for x
    x = 183,768.71/563.91
  6. Step 6: Final answer
    x = 325.88

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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.