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Finding the Fourth Proportional to 661.95, 913.50 and 367.22

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Solution

The fourth proportional to 661.95, 913.50 and 367.22 is: 506.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    661.95 : 913.50 = 367.22 : x
  2. Step 2: Convert to fraction form
    661.95/913.50 = 367.22/x
  3. Step 3: Cross multiply
    661.95x = 913.50 × 367.22
  4. Step 4: Simplify right side
    661.95x = 335,457.75
  5. Step 5: Solve for x
    x = 335,457.75/661.95
  6. Step 6: Final answer
    x = 506.77

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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.