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Finding the Fourth Proportional to 660.66, 911.71 and 365.95

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Solution

The fourth proportional to 660.66, 911.71 and 365.95 is: 505.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    660.66 : 911.71 = 365.95 : x
  2. Step 2: Convert to fraction form
    660.66/911.71 = 365.95/x
  3. Step 3: Cross multiply
    660.66x = 911.71 × 365.95
  4. Step 4: Simplify right side
    660.66x = 333,639.81
  5. Step 5: Solve for x
    x = 333,639.81/660.66
  6. Step 6: Final answer
    x = 505.01

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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.