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Finding the Fourth Proportional to 665.28, 918.07 and 366.54

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Solution

The fourth proportional to 665.28, 918.07 and 366.54 is: 505.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    665.28 : 918.07 = 366.54 : x
  2. Step 2: Convert to fraction form
    665.28/918.07 = 366.54/x
  3. Step 3: Cross multiply
    665.28x = 918.07 × 366.54
  4. Step 4: Simplify right side
    665.28x = 336,505.70
  5. Step 5: Solve for x
    x = 336,505.70/665.28
  6. Step 6: Final answer
    x = 505.81

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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.