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Finding the Fourth Proportional to 660.52, 911.96 and 411.88

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Solution

The fourth proportional to 660.52, 911.96 and 411.88 is: 568.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    660.52 : 911.96 = 411.88 : x
  2. Step 2: Convert to fraction form
    660.52/911.96 = 411.88/x
  3. Step 3: Cross multiply
    660.52x = 911.96 × 411.88
  4. Step 4: Simplify right side
    660.52x = 375,618.08
  5. Step 5: Solve for x
    x = 375,618.08/660.52
  6. Step 6: Final answer
    x = 568.67

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.