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Finding the Fourth Proportional to 660.89, 912.09 and 366.22

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Solution

The fourth proportional to 660.89, 912.09 and 366.22 is: 505.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    660.89 : 912.09 = 366.22 : x
  2. Step 2: Convert to fraction form
    660.89/912.09 = 366.22/x
  3. Step 3: Cross multiply
    660.89x = 912.09 × 366.22
  4. Step 4: Simplify right side
    660.89x = 334,025.60
  5. Step 5: Solve for x
    x = 334,025.60/660.89
  6. Step 6: Final answer
    x = 505.42

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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.