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Finding the Fourth Proportional to 660.25, 911.10 and 365.50

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Solution

The fourth proportional to 660.25, 911.10 and 365.50 is: 504.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    660.25 : 911.10 = 365.50 : x
  2. Step 2: Convert to fraction form
    660.25/911.10 = 365.50/x
  3. Step 3: Cross multiply
    660.25x = 911.10 × 365.50
  4. Step 4: Simplify right side
    660.25x = 333,007.05
  5. Step 5: Solve for x
    x = 333,007.05/660.25
  6. Step 6: Final answer
    x = 504.37

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Double scale
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Similar ratio
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1.5x scale

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.