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Finding the Fourth Proportional to 563.70, 845.15 and 216.90

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Solution

The fourth proportional to 563.70, 845.15 and 216.90 is: 325.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    563.70 : 845.15 = 216.90 : x
  2. Step 2: Convert to fraction form
    563.70/845.15 = 216.90/x
  3. Step 3: Cross multiply
    563.70x = 845.15 × 216.90
  4. Step 4: Simplify right side
    563.70x = 183,313.04
  5. Step 5: Solve for x
    x = 183,313.04/563.70
  6. Step 6: Final answer
    x = 325.20

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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.