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Finding the Fourth Proportional to 660.43, 911.37 and 365.69

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Solution

The fourth proportional to 660.43, 911.37 and 365.69 is: 504.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    660.43 : 911.37 = 365.69 : x
  2. Step 2: Convert to fraction form
    660.43/911.37 = 365.69/x
  3. Step 3: Cross multiply
    660.43x = 911.37 × 365.69
  4. Step 4: Simplify right side
    660.43x = 333,275.25
  5. Step 5: Solve for x
    x = 333,275.25/660.43
  6. Step 6: Final answer
    x = 504.64

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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.