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Finding the Fourth Proportional to 661.03, 912.25 and 366.33

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Solution

The fourth proportional to 661.03, 912.25 and 366.33 is: 505.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    661.03 : 912.25 = 366.33 : x
  2. Step 2: Convert to fraction form
    661.03/912.25 = 366.33/x
  3. Step 3: Cross multiply
    661.03x = 912.25 × 366.33
  4. Step 4: Simplify right side
    661.03x = 334,184.54
  5. Step 5: Solve for x
    x = 334,184.54/661.03
  6. Step 6: Final answer
    x = 505.55

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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.