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Finding the Fourth Proportional to 660.85, 911.91 and 366.07

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Solution

The fourth proportional to 660.85, 911.91 and 366.07 is: 505.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    660.85 : 911.91 = 366.07 : x
  2. Step 2: Convert to fraction form
    660.85/911.91 = 366.07/x
  3. Step 3: Cross multiply
    660.85x = 911.91 × 366.07
  4. Step 4: Simplify right side
    660.85x = 333,822.89
  5. Step 5: Solve for x
    x = 333,822.89/660.85
  6. Step 6: Final answer
    x = 505.14

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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.