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Finding the Fourth Proportional to 661.46, 912.87 and 366.78

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Solution

The fourth proportional to 661.46, 912.87 and 366.78 is: 506.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    661.46 : 912.87 = 366.78 : x
  2. Step 2: Convert to fraction form
    661.46/912.87 = 366.78/x
  3. Step 3: Cross multiply
    661.46x = 912.87 × 366.78
  4. Step 4: Simplify right side
    661.46x = 334,824.74
  5. Step 5: Solve for x
    x = 334,824.74/661.46
  6. Step 6: Final answer
    x = 506.19

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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.