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Finding the Fourth Proportional to 661.87, 913.31 and 367.07

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Solution

The fourth proportional to 661.87, 913.31 and 367.07 is: 506.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    661.87 : 913.31 = 367.07 : x
  2. Step 2: Convert to fraction form
    661.87/913.31 = 367.07/x
  3. Step 3: Cross multiply
    661.87x = 913.31 × 367.07
  4. Step 4: Simplify right side
    661.87x = 335,243.68
  5. Step 5: Solve for x
    x = 335,243.68/661.87
  6. Step 6: Final answer
    x = 506.51

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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.