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Finding the Fourth Proportional to 660.41, 911.57 and 411.58

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Solution

The fourth proportional to 660.41, 911.57 and 411.58 is: 568.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    660.41 : 911.57 = 411.58 : x
  2. Step 2: Convert to fraction form
    660.41/911.57 = 411.58/x
  3. Step 3: Cross multiply
    660.41x = 911.57 × 411.58
  4. Step 4: Simplify right side
    660.41x = 375,179.64
  5. Step 5: Solve for x
    x = 375,179.64/660.41
  6. Step 6: Final answer
    x = 568.11

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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.