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Finding the Fourth Proportional to 581.98, 872.79 and 216.67

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Solution

The fourth proportional to 581.98, 872.79 and 216.67 is: 324.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    581.98 : 872.79 = 216.67 : x
  2. Step 2: Convert to fraction form
    581.98/872.79 = 216.67/x
  3. Step 3: Cross multiply
    581.98x = 872.79 × 216.67
  4. Step 4: Simplify right side
    581.98x = 189,107.41
  5. Step 5: Solve for x
    x = 189,107.41/581.98
  6. Step 6: Final answer
    x = 324.94

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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.